Cosmetics

Sea water

Indoor air

Atmosphere

Organic acid

Food additive

Capillary electrophoresis

High-performance liquid chromatography

Ion chromatography

Iodine

Analytical chemistry

Nanotechnology/Materials, Green/sustainable/environmental chemistry

Nanotechnology/Materials, Analytical chemistry, Analytical Chemistry

Apr. 2020 - Present
Nihon Universit, College of Science and Technology, Associate Professor

Apr. 2012 - Mar. 2020
Nihon Universit, College of Science and Technology, Assistant professor

Aug. 2016 - Aug. 2017
University of Texas at Arlington, College of Science, Visiting Research Scholar

Apr. 2004 - Mar. 2012
Nihon University, College of Science and Technology, Research assistant

08 Apr. 2002 - 25 Mar. 2004
Graduate School of Nihon University, Division of Science and Engineering, Department of Industrial Chemistry

Apr. 1998 - Mar. 2002
Nihon University, College of Science and Technology, Department of Industrial Chemistry

Apr. 2018 - Present
イオンクロマトグラフィー分析士認証試験問題作成小委員, イオンクロマトグラフィー研究懇談会

Apr. 2018 - Present
イオンクロマトグラフィー分析士認証専門委員, イオンクロマトグラフィー研究懇談会

Apr. 2017 - Present
イオンクロマトグラフィー分析士認証試験実行委員, イオンクロマトグラフィー研究懇談会

Apr. 2014 - Present
運営委員, イオンクロマトグラフィー研究懇談会

Apr. 2019 - Dec. 2019
第36回イオンクロマトグラフィー討論会 実行委員, イオンクロマトグラフィー研究懇談会

Apr. 2018 - Dec. 2018
第35回イオンクロマトグラフィー討論会 実行委員, イオンクロマトグラフィー研究懇談会

Apr. 2017 - Mar. 2018
国際会議担当小委員, イオンクロマトグラフィー研究懇談会

Apr. 2015 - Sep. 2015
Organization Committee of the 8th Asia-Pacific Symposium on Ion Analysis, Ion Chromatography Discussion Group of the Japan Society for Analytical Chemistry

Apr. 2014 - Nov. 2014
第31回イオンクロマトグラフィー討論会 実行委員, イオンクロマトグラフィー研究懇談会

Jun. 2023
（公社）日本分析化学会 有機微量分析研究懇談会, Oral presentation award
★Analysis of iodine in brine and hot spring water sampled in Chiba Prefecture using ion chromatography
Kenji Yoshikawa;Midori Inoue;Takeshi Toyama;Hisomu Nagashima

Ion Chromatography Discussion Group of the Japan Society for Analytical Chemistry, Encouraging Prize of Ion Chromatography
★イオンクロマトグラフィー及びキャピラリー電気泳動法による食品中の微量有機酸ならびに無機陰イオンの同時分析法の確立と応用, Japan society
Kenji Yoshikawa

★Butyric acid modulates periodontal nociception in Porphyromonas gingivalis-induced periodontitis
Naoki Murakami; Kenji Yoshikawa; Kohei Tsukada; Noriaki Kamio; Yoshinori Hayashi; Suzuro Hitomi; Yuki Kimura; Ikuko Shibuta; Ayaka Osada; Shuichi Sato; Koichi Iwata; Masamichi Shinoda
Journal of Oral Science, Jan. 2022, Refereed, Not invited

★Automated Programmable Generation of Broad pH Range Volatile Ionic Eluents for Liquid Chromatography
C. P. Shelor; K. Yoshikawa; P. K. Dasgupta
Analytical Chemistry, Mar. 2021, Refereed, Not invited

★Determination of Trace Anions in Heavy Metal Salt Reagents Using an Ion Chromatography Coupled with an In-line Metal Elimination Device
Seiichi Suzuki; Takahisa Yamamoto; Yasuyuki Kobayashi; Yoshinori Inoue; Kenji Yoshikawa; Takeshi Toyama
Bunseki Kagaku, Jun. 2020, Refereed, Not invited

★Determination of Anions in High Concentration of Sodium Hydroxide Solutions by Ion Chromatography with Inline Neutralization Method
Seiichi Suzuki; Takahisa Yamamoto; Yasuyuki Kobayashi; Yoshinori Inoue; Kenji Yoshikawa; Takeshi Toyama
Bunseki Kagaku, Jun. 2020, Refereed, Not invited

★Determination of Trace Ammonium Ion in Seawater by Ion Chromatography Using a Column Switching
Mayu Fukunaga; Seiichi Suzuki; Takahisa Yamamoto; Kenji Yoshikawa; Takeshi Toyama
Bunseki Kagaku, Nov. 2019, Refereed, Not invited

★Analytical Method for Ionic Compounds Contained in Gaseous and Particulate Matter in Indoor Air by Ion Chromatography
Hirogo Minamisawa; Kenji Yoshikawa; Toshirou Matsumura; Akio Sakuragawa
Bunseki Kagaku, Sep. 2019, Refereed, Not invited

★Microanalysis of cations and anions in edible salt by ion chromatography
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
Bunseki Kagaku, Mar. 2019, Refereed, Not invited
Corresponding

★Determination of Formaldehyde in Water Samples by High-Performance Liquid Chromatography with Methyl Acetoacetate Derivatization
Kenji Yoshikawa; Yusuke Oshima; Ayaka Inagaki and Akio Sakuragawa
Bulletin of Environmental Contamination and Toxicology, Oct. 2018, Refereed, Not invited
Lead

★Determination of Various Inorganic Anions and Organic Acids in the Atmospheric Particulate Matter Using Capillary Zone Electrophoresis with Indirect UV Detection
Kenji Yoshikawa; Miki Shimizu; Toshiro Matsumura and Akio Sakuragawa
International Journal of Environmental Analytical Chemistry, Jul. 2018, Refereed, Not invited
Lead

★Automated Programmable Preparation of Carbonate-Bicarbonate Eluents for Ion Chromatography with Pressurized Carbon Dioxide
Charles Phillip Shelor; Kenji Yoshikawa; Purnendu K. Dasgupta
Analytical Chemistry, Aug. 2017, Refereed, Not invited

★Simultaneous Determination of Potassium, Magnesium and Calcium in Milk by Ion Chromatography
Arata Asada; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
BUNSEKI KAGAKU, Feb. 2017, Refereed, Not invited

★Determination method of VOCs in indoor air using SPME
Natsuho Gokita; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
JOURNAL OF JAPAN AIR CLEANING ASSOCIATION, Mar. 2015, Refereed, Not invited

★Determination of sulfite in wines using suppressed ion chromatography
Kenji Yoshikawa; Yuki Uekusa; Akio Sakuragawa
Food Chemistry, Nov. 2014, Refereed, Not invited
Lead

★Determination of Micro Amount of Hydrogen Peroxide by a Zero-emission FIA System with Immobilized Peroxidase Enzyme Reactor Column
Akio Sakuragawa; Kenji Yoshikawa; Shinnosuke Ishiduka
BUNSEKI KAGAKU, Jul. 2014, Refereed, Not invited

★A consideration on analytical method of styrene in indoor air by using charcoal tube collection / carbon disulfide extraction / GC-MS method
Toshiro Matsumura; Sho Saito; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; kuniaki Matsunobu; Reiji Aoyagi
JOURNAL OF JAPAN AIR CLEANING ASSOCIATION, Mar. 2013, Refereed, Not invited

★High performance liquid chromatography of formaldehyde in indoor air using miniature diffusion scrubber and 2,4-pentanedione
Yohei Hosoda; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Reiji Aoyagi; Ai Nakamura; Kuniaki Matsunobu
Indoor Environment, Jun. 2012, Refereed, Not invited

★Determination of Formaldehyde in Seawater Samples by High-performance Liquid Chromatography with UV detection using an Acetylacetone Derivatization
Tatsuya Morita; Taichi Ishikawa and Akio Sakuragawa
Bulletin of the Society of Sea Water Science, Japan, Apr. 2011, Refereed, Not invited
Lead

★Simultaneous analysis of acidulants and preservatives in food samples by using capillary zone electrophoresis with indirect UV detection
Kenji Yoshikawa; Shintaro Saito; Akio Sakuragawa
Food Chemistry, Feb. 2011, Refereed, Not invited
Lead

★Determination of Chloroacetic Acids in Drinking Water Using Suppressed Ion Chromatography with Solid-Phase Extraction
Kenji Yoshikawa; Yuko Soda; Akio Sakuragawa
Analytical Science, Dec. 2009, Refereed, Not invited
Lead

★Flow injection analysis of boron in iron and steel samples after pre-concentration and separation with chelate fiber
Masahiro Naka; Kenji Yoshikawa; Akio Sakuragawa
REPORT OF THE RESEARCH INSTITUTE OF SCIENCE AND TECHNOLOGY NIHON UNIVERSITY, Mar. 2009, Refereed, Not invited

★Ion chromatographic determination of organic acids in food samples using a permanent coating graphite carbon column
Miho Okamura; Miki Inokuchi; Akio Sakuragawa
Talanta, Nov. 2007, Refereed, Not invited
Lead

★Direct Simultaneous Determination for Ultratrace As, Se and Sb in River Water with Graphite Furnace-AAS by TiO2-Slurry Sampling
Liang Zhang; Yukitoki Morita; Kenji Yoshikawa; Akinori Isozaki
Analytical Science, Mar. 2007, Refereed, Not invited

★Ion chromatographic determination of organic acids in food samples using permanent coating graphite carbon column and mobile phase with benzoate
K Yoshikawa; M Okamura; M Inokuchi; A Sakuragawa
BUNSEKI KAGAKU, Dec. 2005, Refereed, Not invited

★Ion chromatography of selenite and selenate using column packing with poly(vinyl alcohol) gel
A Isozaki; K Yoshikawa; H Nagashima
BUNSEKI KAGAKU, Jan. 2004, Refereed, Not invited

★Separation behavior of anions with poly (vinyl alcohol) column and application to water analysis
Akinori Isozaki; Kenji Yoshikawa; Hisomu Nagashima
Industrial Water, Oct. 2003, Refereed, Not invited

★不純物の分析法と化学物質の取り扱い
吉川賢治,他57名, Joint work
技術情報協会, Jan. 2024
9784861049989

★キャピラリー電気泳動法・イオンクロマトグラフィーの分析テクニック
吉川賢治,他66名, Joint work, 第1章・第1節 キャピラリー電気泳動法の測定原理と装置構成
株式会社技術情報協会, Dec. 2023
9784861049934

★基礎教育シリーズ分析化学＜基礎編＞
本水昌二,朝本紘充,石坂昌司,井原敏博,内山一美,齊藤和憲,佐藤健二,塚原 聡,中釜達朗,西澤精一,沼田 靖,南澤宏明,森田孝節,吉川賢治, Joint work, 第4章 酸塩基反応
東京教学社, Mar. 2021

★Undergraduate Experiments in Chemistry from Basic Chemistry to Biochemistry and Functional Materials
Joint work, 12-19（一部執筆）及び45-51
共立出版, Mar. 2016, Not refereed

★物質応用化学インセンティブ1.7 試料中に隠された真実とは？ －「分析化学」で微量化学成分の存在を解明せよ！－
Joint work, 42‐48
化学工業社, Mar. 2013, Not refereed

★物質応用化学インセンティブ1.9 物質を泳がせて一気に測定する －フローシステムを利用したオンライン分析法－
Joint work, 55‐60
化学工業社, Apr. 2009, Not refereed

★咬筋内で産生されるアデノシン三リン酸の分析および顎関節痛発症への関与
Fumitaka Yagasaki; Sho Sawada; Kenji Yoshikawa; Masamichi Shinoda
72nd Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2023, Not invited

★Analysis of iodine in brine and hot spring water sampled in Chiba Prefecture using ion chromatography
Kenji Yoshikawa; Midori Inoue; Takeshi Toyama; Hisomu Nagashima
第90回日本分析化学会有機微量分析研究懇談会，第122回計測自動制御学会力学量計測部会，第40回合同シンポジウム, Jun. 2023, Not invited

★Simultaneous analysis of organic acids in food samples using high-performance liquid chromatography with surfactant-coated column
Yuya Ohara; Shoko Koike; Kenji Yoshikawa; Takeshi Toyama
66th Academic Lecture of College of Science and Technology, Nihon University, Dec. 2022, College of Science and Technology, Nihon University

★界面活性剤コーティングカラムを用いた高速液体クロマトグラフィーによる食品中の有機酸の同時分析
Yuya Ohara; Kenji Yoshikawa
71st Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2022, The Japan Society for Analytical Chemistry, Invited

★食品中の微量成分の多成分同時分析法について
Kenji Yoshikawa
分離技術会 年会2021, Nov. 2021, 分離技術会, Invited

★空気中のフタル酸エステル類の粒径別分析およびその応用
Shun Watanabe; Kenji Yoshikawa
70th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2021, The Japan Society for Analytical Chemistry, Invited

★イオンクロマトグラフィーによる温泉水中のヨウ化物イオンの分析
Katsuhiko Matsudo; Kenji Yoshikawa,Takeshi Toyama; Hisomu Nagashima
第36回イオンクロマトグラフィー討論会, Dec. 2019, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★歯周組織で産生される短鎖脂肪酸の経時的分析およびその評価
Kohei Tsukada; Naoki Murakami; Kenji Yoshikawa,Masamichi Shinoda; Takeshi Toyama
第36回イオンクロマトグラフィー討論会, Dec. 2019, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★界面活性剤コーティングカラムを用いた食品中の有機酸分析のための基礎的研究
Megumi Yaginuma; Kenji Yoshikawa,Takeshi Toyama
第36回イオンクロマトグラフィー討論会, Dec. 2019, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★イオンクロマトグラフィーによる食用塩中のカチオンおよびアニオンの分析（その2）
Kazuma Aoki; Ryutaro Imai; Kenji Yoshikawa,Takeshi Toyama; Hisomu Nagashima
第36回イオンクロマトグラフィー討論会, Dec. 2019, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★リンモリブデン酸アンモニウムによる濃縮／イオンクロマトグラフィーによる海水中のセシウムの分析
Kenta Matsumura; Shuki Okada; Ryutaro Imai; Kenji Yoshikawa,Takeshi Toyama
第36回イオンクロマトグラフィー討論会, Dec. 2019, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★Analysis and evaluation of trace harmful components in cosmetics by high-performance liquid chromatography with electrochemical detection
Yumi Ueno; Kenji Yoshikawa; Takeshi Toyama
49th International Symposium on High Performance Liquid Phase Separations and Related Techniques, Dec. 2019, Not invited

★Analysis of cesium in seawater by ion chromatography
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama
49th International Symposium on High Performance Liquid Phase Separations and Related Techniques, Dec. 2019, Not invited

★インライン金属除去デバイス結合イオンクロマトグラフを用いる重金属含有試料中の微量陰イオンの定量
Mayu Fukunaga,Takahisa Yamamoto; Seiichi Suzuki; Kenji Yoshikawa; Takeshi Toyama
68th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2019, The Japan Society for Analytical Chemistry, Invited

★高速液体クロマトグラフィーによる化粧品中の微量有害成分の分析およびその評価
Yumi Ueno,Kenji Yoshikawa; Takeshi Toyama
68th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2019, The Japan Society for Analytical Chemistry, Invited

★Analysis of negative/positive counter ions in pharmaceutical products using ion chromatography (2)
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
68th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2019, The Japan Society for Analytical Chemistry, Not invited

★Analysis of negative/positive counter ions in pharmaceutical products using ion chromatography
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
第86回日本分析化学会有機微量分析研究懇談会，第110回計測自動制御学会力学量計測部会，第36回合同シンポジウム, Jun. 2019, The Japan Society for Analytical Chemistry, Not invited

★Analysis of various ions in milk by ion chromatography using perchlorate deproteinization
Kenji Yoshikawa; Arata Asada; Futa Kogure; Akio Sakuragawa; Hisomu Nagashima
The 43rd International Symposium on Capillary Chromatography & the 16th GCxGC Syposium, May 2019, Not invited

★イオンクロマトグラフィーによる海水中の窒素化合物の分析
Mayu Fukunaga; Takahisa Yamamoto; Seiichi Suzuki; Kenji Yoshikawa; Takeshi Toyama
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★イオンクロマトグラフィーによるかん水中のヨウ素の分析
Tatsumi Terasaka,Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★イオンクロマトグラフィーによる牛乳中のリン酸の定量（その3）
Kohei Tsukada,Kenji Yoshikawa; Takeshi Toyama; Akio Sakuragawa; Hisomu Nagashima
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★高速液体クロマトグラフィーによる化粧品中の微量有害成分の分析およびその評価
Yumi Ueno,Kenji Yoshikawa; Takeshi Toyama
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★イオンクロマトグラフィーによる食用塩中のカチオン及びアニオンの微量分析とその応用（その2）
Ryutaro Imai,Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★Microanalysis of cations and anionsin edible salt by ion chromatography and its application
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
60th Academic Lecture of College of Science and Technology, Nihon University, Nov. 2018, College of Science and Technology, Nihon University, Not invited

★Microanalysis of anions and cations in edible salt by ion chromatography
Ryutaro Imai; Kenji Yoshikawa; Takeshi Toyama; Hisomu Nagashima
第85回日本分析化学会有機微量分析研究懇談会，第107回計測自動制御学会力学量計測部会，第35回合同シンポジウム, Jun. 2018, The Japan Society for Analytical Chemistry, Not invited

★CO2浸透膜を用いた炭酸系溶離液ジェネレーターの開発
Kenji Yoshikawa,Charles Phillip Shelor; Purnendu K. Dasgupta
第34回イオンクロマトグラフィー討論会, Dec. 2017, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

★Gas Permeable Membrane Based Ionic Strength and pH Programmable Volatile Eluent Generators for Liquid Chromatography
Charles. Phillip Shelor; Purnendu K Dasgupta; Kenji Yoshikawa
The 41st International Symposium on Capillary Chromatography & the 14th GCxGC Syposium, May 2017, Not invited

アセト酢酸メチル誘導体化法を用いた高速液体クロマトグラフィーによる水試料中のホルムアルデヒドの定量
Kenji Yoshikawa,Yusuke Oshima; Ayaka Inagaki; Akio Sakuragawa
第35回イオンクロマトグラフィー討論会, Dec. 2018, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Determination method of aldehydes in human breath sample using SPME-GC/MS
Koguchi Hironobu; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Tsutoshi Imanaka
2016 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2016, Society of Indoor Environment Japan, Not invited

Simultaneous analysis of gaseous and particulate substances in air by suppressed ion chromatography
Hirogo Minamisawa; Kenji Yoshikawa; Toshiro Matsumura; Akio Sakuragawa
65th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2016, The Japan Society for Analytical Chemistry, Not invited

高速液体クロマトグラフィーを用いた水中に含まれるホルムアルデヒドの定量
Yusuke Oshima; Kenji Yoshikawa; Akio Sakuragawa
65th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2016, The Japan Society for Analytical Chemistry, Not invited

2チャンネル検出法を用いたノンサプレッサー型イオンクロマトグラフィーによるリンゴ酸を中心とする有機酸及び無機陰イオンの同時分析
Hayato Arai; Kenji Yoshikawa; Akio Sakuragawa
65th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2016, The Japan Society for Analytical Chemistry, Not invited

Simultaneous determination of potassium, magunesium and calcium in food samples by ion chromatography
Arata Asada; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
65th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2016, The Japan Society for Analytical Chemistry, Not invited

室内空気質に関する研究 －粒子状及びガス状物質の簡便な同時分離分析法の確立－
Hirogo Minamisawa; Kenji Yoshikawa; Akio Sakuragawa
分離技術会年会2016, May 2016, The Society of Separation Process Engineers, Japan, Not invited

Determination method of aldehydes in human breath sample using SPME-GC/MS
Eriko Sato; Natsuho Gokita; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2015 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2015, Society of Indoor Environment Japan, Not invited

Determination method of VOCs in human breath sample using SPME-GC/MS
Natsuho Gokita; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2015 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2015, Society of Indoor Environment Japan, Not invited

Simultaneous analysis of gaseous and particulate acidic substances in air by suppressed ion chromatography
Hirogo Minamisawa; Kenji Yoshikawa; Akio Sakuragawa
64th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2015, The Japan Society for Analytical Chemistry, Not invited

Analysis of fluorine and halogens in tea leaves by combustion-ion chromatography (2)
Hayato Arai; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
64th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2015, The Japan Society for Analytical Chemistry, Not invited

Simultaneous determination of potassium, calcium and magnesium in milk and drinking water by ion chromatography with perchloric acid deproteinization (2)
Arata Asada; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
64th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2015, The Japan Society for Analytical Chemistry, Not invited

Determination of phosphorus in food samples using suppressed ion chromatography
Fuuta Kogure; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
64th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2015, The Japan Society for Analytical Chemistry, Not invited

Determination of Various Ions in Suspended Particulate Matter Contained in Atmosphere Using Non-Suppressed Ion Chromatography
Kenji Yoshikawa; Yu Suzuki; Ryo Yoshioka; Arata Asada; Hayato Arai; Akio Sakuragawa
The 8th Asia-Pacific Symposium on Ion Analysis, Sep. 2015, The Japan Society for Analytical Chemistry

Simultaneous Analysis of Acidic Substances in Air by Suppressed Ion Chromatography
Hirogo Minamisawa; Mayu Tsutsumi; Takanori Shishikura; Kenji Yoshikawa; Akio Sakuragawa
The 8th Asia-Pacific Symposium on Ion Analysis, Sep. 2015, The Japan Society for Analytical Chemistry, Not invited

Determination method of VOCs in indoor air using SPME
Natsuho Gokita; Toshirou Matsumura; Youichi Shitanaka; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2014 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2014, Society of Indoor Environment Japan, Not invited

Determination method of VOCs in human breath sample using SPME-GC/MS - As biomarkers of lung cancer -
Tomo Ohkanda; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2014 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2014, Society of Indoor Environment Japan, Not invited

Simultaneous analysis of acidic matter in air samples by ion chromatograph
Hirogo Minamisawa; Takanori Shishikura; Kenji Yoshikawa; Akio Sakuragawa
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Determination of formaldehyde in river water by high performance liquid chromatograph
Keiichi Ishikawa; Takaki Nagashima; Kenji Yoshikawa; Akio Sakuragawa
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Analysis of fluorine and halogens in tea leaves by combustion-ion chromatography
Hayato Arai; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Simultaneous determination of potassium, calcium and magnesium in milk and drinking water by ion chromatography with perchloric acid deproteinization
Arata Asada; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Determination of phosphate in milk using ion chromatography (2)
Futa Kogure; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Simultaneous analysis of synthetic dyes in food samples by capillary zone electrophoresis
Somura Takafumi; Kenji Yoshikawa; Akio Sakuragawa
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Simultaneous analysis of acidic substances in air samples
Kenji Yoshikawa; Akio Sakuragawa
第31回イオンクロマトグラフィー討論会, Nov. 2014, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Simultaneous analysis of synthetic dyes in food samples by capillary zone electrophoresis
Takafumi Somura; Kenji Yoshikawa; Akio Sakuragawa
63rd Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2014, The Japan Society for Analytical Chemistry, Not invited

Determination of phosphate in milk using ion chromatography
Futa Kogure; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第81回日本分析化学会有機微量分析研究懇談会，第95回計測自動制御学会力学量計測部会，第31回合同シンポジウム, Jun. 2014, The Japan Society for Analytical Chemistry, Not invited

Determination method of VOCs in indoor air using SPME
Natsuho Gokita; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
31th Annual Technical Meeting on Air Cleaning and Contamination Control, May 2014, Japan Air Cleaning Association, Not invited

The simultaneous determination method of aldehyde and nitrogen dioxide in air using HPLC
Makoto Iizuka; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
31th Annual Technical Meeting on Air Cleaning and Contamination Control, May 2014, Japan Air Cleaning Association, Not invited

Simultaneous analysis of synthetic dyes in food samples by capillary zone electrophoresis
Takafumi Somura; Kenji Yoshikawa; Akio Sakuragawa
52nd Academic Lecture of College of Science and Technology, Nihon University, Dec. 2013, College of Science and Technology, Nihon University, Not invited

Development of the active sampler for the formaldehyde in indoor air using 2,4-pentadione impregnated silica gel scavenger
Makoto Iizuka; Toshiro Matsumura; Kenji Yoshikawa; Akio Sakuragawa; Ai Nakamura; Reiji Aoyagi; Kunitoshi Matsunobu; Hideto Jinno
57th Academic Lecture of College of Science and Technology, Nihon University, Dec. 2013, College of Science and Technology, Nihon University, Not invited

Simultaneous microanalysis of organic acids and inorganic anions in food samples and its application using an ion chromatography and capillary electrophoresis
Kenji Yoshikawa
第30回イオンクロマトグラフィー討論会, Nov. 2013, （公社）日本分析化学会 イオンクロマトグラフィー研究懇談会, Invited

Simultaneous analysis of synthetic dyes in food samples by capillary zone electrophoresis
Takafumi Somura; Kenji Yoshikawa; Akio Sakuragawa
Separation Sciences 2013, Aug. 2013, The Japan Society for Analytical Chemistry, Not invited

The study on the 2,4-pentanedione impregnation silica gel scavenger for the formaldehyde measurement (1)
Nozomu Nagakura; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Reiji Aoyagi; Ai Nakamura; Kuniaki Matsunobu
2012 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2012, Society of Indoor Environment Japan, Not invited

The study on the 2,4-pentanejione impregnation silica gel scavenger for the formaldehyde measurement(2)
Keiko Suzuki; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Reiji Aoyagi; Kouhei Yamashita; Ai Nakamura; Kuniaki Matsunobu
2012 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2012, Society of Indoor Environment Japan, Not invited

The determination method of organic acid and aldehydes in indoor air using high performance liquid chromatography
Shimizu Naho; Toshirou Matsumura; Tsutoshi Imanaka; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
平成24年度 室内環境学会学術大会, Dec. 2012, Society of Indoor Environment Japan, Not invited

Analytical method of styrene in indoor air using charcoal tube collection/carbon disulfide extraction/GC-MS method
Shou Saitou; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2012 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2012, Society of Indoor Environment Japan, Not invited

The determination method of nitrosoamine in the air using SPME －Thermal desorption method－
Shinpei Asai; Toshirou Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2012 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2012, Society of Indoor Environment Japan, Not invited

Determination of sulfite ion in food samples using suppressed ion chromatography
Yuuki Uekusa; Kenji Yoshikawa; Akio Sakuragawa
61st Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2012, The Japan Society for Analytical Chemistry, Not invited

Simultaneous analysis of acidic substances in air samples by capillary zone electrophoresis
Miki Shimizu; Toshirou Matsumura; Kenji Yoshikawa; Akio Sakuragawa
61st Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2012, The Japan Society for Analytical Chemistry, Not invited

Flow injection analysis of a micro amount of boron in iron and steel samples by a concentration using chelate fiber
Yoshihiko Yoichi; Akio Sakuragawa; Kenji Yoshikawa; Hiroki Ohkubo
The 164th ISIJ Meeting, Sep. 2012, The Iron and Steel Institute of Japan, Not invited

ハロゲン及び硫黄の自動分析装置の開発（その20）食品試料への適用
Hisomu Nagashima; Takafumi Iwai; Kenji Yoshikawa; Akio Sakuragawa; Kazuyoshi Fujimura
第79回日本分析化学会有機微量分析研究懇談会，第89回計測自動制御学会力学量計測部会，第29回合同シンポジウム, Jun. 2012, The Japan Society for Analytical Chemistry, Not invited

Simultaneous determination method of nitrogen dioxide and aldehyde in indoor air using HPLC
Toshirou Matsumura; Miki Muramatsu; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Reiji Aoyagi; Kuniaki Matsunobu; Yuuichirou Kaifuku
29th Annual Technical Meeting on Air Cleaning and Contamination Control, Jun. 2012, Japan Air Cleaning Association, Not invited

A consideration on analytical method of styrene in indoor air using charcoal tube collection / carbon disulfide extraction / GC-MS method
Toshiro Matsumura; Naoki Maeda; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
29th Annual Technical Meeting on Air Cleaning and Contamination Control, Jun. 2012, Japan Air Cleaning Association, Not invited

The simultaneous determination method of aldehyde and nitrogen dioxide in air using HPLC
Miki Muramatsu; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kuniaki Matsunobu; Ai Nakamura
2011 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2011, Society of Indoor Environment Japan, Not invited

The determination method of nitroso compound in the air using SPME
Hiroyuki Asahi; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
2011 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2011, Society of Indoor Environment Japan, Not invited

Determination of formaldehyde in water samples by high-performance liquid chromatography
Taichi Ishikawa; Kenji Yoshikawa; Akio Sakuragawa
60th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2011, The Japan Society for Analytical Chemistry, Not invited

Determination of sulfite ion in food samples using suppressed ion chromatography
Yuki Uekusa; Kenji Yoshikawa; Akio Sakuragawa
Separation Sciences 2011, Sep. 2011, The Japan Society for Analytical Chemistry, Not invited

The development of the active sampler for formaldehyde using 2,4-pentanedione impregnation silica gel scavenger (2)
Toshiro Matsumura; Yohei Hosoda; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kuniaki Matsunobu; Reiji Aoyagi; Yuichiro Kaifuku
28th Annual Technical Meeting on Air Cleaning and Contamination Control, Jul. 2011, Japan Air Cleaning Association, Not invited

The development of the passive sampler for formaldehyde using 2,4-pentanedione impregnation silica gel scavenger
Toshiro Matsumura; Yohei Hosoda; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kuniaki Matsunobu; Reiji Aoyagi; Yuichiro Kaifuku
28th Annual Technical Meeting on Air Cleaning and Contamination Control, Jul. 2011, Japan Air Cleaning Association, Not invited

Simultaneous analysis of organic acids in atmosphere by capillary zone electrophoresis
Miki Shimizu; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
28th Annual Technical Meeting on Air Cleaning and Contamination Control, Jul. 2011, Japan Air Cleaning Association, Not invited

イオンクロマトグラフィーによる洗浄剤廃液中のフッ化物イオンと近接する疑似イオンの分離分析
Tatsuya Shikakura; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第78回日本分析化学会有機微量分析研究懇談会，第86回計測自動制御学会力学量計測部会，第28回合同シンポジウム, May 2011, The Japan Society for Analytical Chemistry, Not invited

Active sampling - HPLC method of the formaldehyde in air using the 2,4-pentanedione impregnated silica gel scavenger
Yohei Hosoda; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kunitoshi Matsunobu; Ai Nakamura
2010 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2010, Society of Indoor Environment Japan, Not invited

The determination method of the nitrosoamine in air by carbon disk filter collection and solvent extraction - GC/MS method
Sachie Nakayama; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Tsutoshi Imanaka
2010 Annual Meeting of The Society of Indoor Environment, Japan, Dec. 2010, Society of Indoor Environment Japan, Not invited

Determination of sulfite ion in food samples using suppressed ion chromatography (1)
Tatsuya Shikakura; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
Separation Sciences 2010, Aug. 2010, The Japan Society for Analytical Chemistry, Not invited

High performance liquid chromatography of formaldehyde in indoor air using a miniture diffusion scrubber
Yohei Hosoda; Toshiro Matsumura; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kuniaki Matsunobu; Ai Nakamura
Pre-ISCC 2010 Tech. Meeting on Air Cleaning and Contamination Control, Jun. 2010, Japan Air Cleaning Association, Not invited

Determination of formaldehyde in seawater by high-performance liquid chromatography
Tatsuya Morita; Kenji Yoshikawa; Akio Sakuragawa
The 71th Symposium of the Japan Society for Analytical Chemistry, May 2010, The Japan Society for Analytical Chemistry, Not invited

Analysis of total iodine in food samples by air combustion / reversed-phase ion-pair chromatography (2)
Nobuhiro Izumi; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
第77回日本分析化学会有機微量分析研究懇談会，第83回計測自動制御学会力学量計測部会第27回合同シンポジウム, May 2010, The Japan Society for Analytical Chemistry, Not invited

High performance liquid chromatography of formaldehyde in indoor air using diffusion scrubber and acetylacetone
Yohei Hosoda; Toshiro Matsumura Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa; Kuniaki Matsunobu; Ai Nakamura
Annual Meeting of the Society of Indoor Environment Japan 2009, Dec. 2009, Society of Indoor Environment Japan, Not invited

Analysis of total iodine in food samples by air combustion / reversed-phase ion-pair chromatography
Nobuhiro Izumi; Yu Kayugome; Kenji Yoshikawa; Akio Sakuragawa; Hisomu Nagashima
Separation Sciences 2009, Oct. 2009, The Japan Society for Analytical Chemistry, Not invited

Photometric determination of a trace amount of nitrite in nitric acids based on the color fading of the iron(Ⅲ) thiocyanate complex and its reaction mechanism
Tomohiro Takahashi; Kenji Yoshikawa; Akio Sakuragawa
58th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2009, The Japan Society for Analytical Chemistry, Not invited

Determination of chloroacetic acids in water samples using an ion chromatography
Fumiyoshi Kaji; Kenji Yoshikawa; Akio Sakuragawa
58th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2009, The Japan Society for Analytical Chemistry, Not invited

Simultaneous analysis of preservative and sourness composition of organic acids in food samples by capillary zone electrophoresis
Shintaro Saito; Kenji Yoshikawa; Akio Sakuragawa
58th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2009, The Japan Society for Analytical Chemistry, Not invited

Ion-pair chromatography of molybdenum(V) and (VI) with a C30 stationary phase
Takayuki Miyata; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
52nd Academic Lecture of College of Science and Technology, Nihon University, Nov. 2008, College of Science and Technology, Nihon University, Not invited

Ion chromatography of perchlorate ion with a graphite carbon column
Shinya Furuta; Kenji Yoshikawa; Yukitoki Morita; Akio Sakuragawa
52nd Academic Lecture of College of Science and Technology, Nihon University, Nov. 2008, College of Science and Technology, Nihon University, Not invited

Determination of formaldehyde in seawater by high-performance liquid chromatography
Hiroyuki Murakami; Tatsuya Morita; Saki Yoshikawa; Kenji Yoshikawa; Akio Sakuragawa
Separation Sciences 2008, Nov. 2008, The Japan Society for Analytical Chemistry, Not invited

Ion chromatographic determination of organic acids using a permanent coating graphite carbon column and a mobile phase of the carbonic acid
Toshiya Sekine; Kenji Yoshikawa; Akio Sakuragawa
57th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2008, The Japan Society for Analytical Chemistry, Not invited

Ion chromatography of haloroacetic acids using poly(vinyl alcohol) column
Yuko Soda; Chiaki Fujishiro; Kenji Yoshikawa; Akinori Isozaki
50th Academic Lecture of College of Science and Technology, Nihon University, Nov. 2006, College of Science and Technology, Nihon University, Not invited

Ion chromatography of hypochlorite ion by the reaction of iodide ion
Koumei Hanabusa; Shin-ya Furuta; Kenji Yoshikawa; Akinori Isozaki
55th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2006, The Japan Society for Analytical Chemistry, Not invited

Ion chromatographic determination of organic acids in food samples using a permanent coating graphite carbon column and a mobile phase of the benzoic acid
Miho Okamura; Kenji Yoshikawa; Akio Sakuragawa
49th Academic Lecture of College of Science and Technology, Nihon University, Nov. 2005, College of Science and Technology, Nihon University, Not invited

Ion chromatography of chloroacetic acids using poly(vinyl alcohol) column and conductivity detection
Yuko Soda; Shiho Miyakata; Kenji Yoshikawa; Yukitoki Morita; Akinori Isozaki
54th Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2005, The Japan Society for Analytical Chemistry, Not invited

Ion chromatographic determination of organic acids using a permanent coating graphite carbon column (2)
Miho Okamura; Kazue Ochi; Miki Inokuchi; Kenji Yoshikawa; Akio Sakuragawa
The 66th Symposium of the Japan Society for Analytical Chemistry, May 2005, The Japan Society for Analytical Chemistry, Not invited

Ion chromatographic determination of halogen acids using a permanent coating graphite carbon column and a conductivity detection
Satoko Akimoto; Yukari Nakamura; Kenji Yoshikawa; Yukitoki Morita; Akinori Isozaki
48th Academic Lecture of College of Science and Technology, Nihon University, Nov. 2004, College of Science and Technology, Nihon University, Not invited

Determination of molybdenum(V) and (VI) by reversed-phase ion-pair chromatography with C30 as a stationary phase
Hiroshi Isoyama; Kumiko Nishi; Kenji Yoshikawa; Yukitoki Morita; Akinori Isozaki
53rd Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2004, The Japan Society for Analytical Chemistry, Not invited

Ion chromatography of selenite and selenate using a column packing with polystyrene gel
Kenji Yoshikawa; Akinori Isozaki; Hisomu Nagashima
第20回イオンクロマトグラフィー討論会, Oct. 2003, The Japan Society for Analytical Chemistry, Not invited

Ion chromatographic determination of halogen acids using permanent coating graphite carbon column (3)
Satoko Akimoto; Kenji Yoshikawa; Yukitoki Morita; Akinori Isozaki; Hisomu Nagashima
52nd Annual Meeting of Japan Society for Analytical Chemistry, Sep. 2003, The Japan Society for Analytical Chemistry, Not invited

Ion chromatography of anions using column packing with hydrophilic poly(vinyl alcohol) gel (2)
Kenji Yoshikawa; Mai Shinoda; Satoko Akimoto; Akinori Isozaki; HIsomu Nagashima
The 64th Symposium of the Japan Society for Analytical Chemistry, May 2003, The Japan Society for Analytical Chemistry, Not invited

Ion chromatography of anions using column packing with hydrophilic poly(vinyl alcohol) gel
Kenji Yoshikawa; Mai Shinoda; Satoko Akimoto; Yukitoki Morita; Akinori Isozaki
46th Academic Lecture of College of Science and Technology, Nihon University, Nov. 2002, College of Science and Technology, Nihon University, Not invited

Ion chromatography of anions using column packing with poly(vinyl alcohol) gel
Kenji Yoshikawa; Seiichi Suzuki; Yukitoki Morita; Akinori Isozaki; Hisomu Nagashima
The 63rd Symposium of the Japan Society for Analytical Chemistry, May 2002, The Japan Society for Analytical Chemistry, Not invited

Career Design for Materials and Applied Chemistry
Apr. 2022 - Present
Nihon University, College of Science and Technology

Environmental Chemistry I
Apr. 2021 - Present
Nihon University, College of Science and Technology

Applied Analytical chemistry I
Apr. 2021 - Present
Nihon University, Graduate School of Science and Technology

Graduate Reserch on Materials Chemistry
Apr. 2020 - Present
Nihon University, Graduate School of Science and Technology

Seminor on Applied Chemistry II
Apr. 2020 - Present
Nihon University, Graduate School of Science and Technology

Seminor on Applied Chemistry I
Apr. 2020 - Present
Nihon University, Graduate School of Science and Technology

Analytical chemistry II
Apr. 2015 - Present
Nihon University Junior College

Fundamentals of Graduetion Thesis Laboratory
Apr. 2015 - Present
Nihon University, College of Science and Technology

Specialized Chemical Laboratory II
Apr. 2014 - Present
Nihon University, College of Science and Technology

Graduation Thesis
Apr. 2012 - Present
Nihon University, College of Science and Technology

Chemical Presentation
Apr. 2012 - Present
Nihon University, College of Science and Technology

Graduation Thesis Laboratory
Apr. 2012 - Present
Nihon University, College of Science and Technology

Analytical chemistry II
Apr. 2012 - Present
Nihon University, College of Science and Technology

Chemical Writing
Apr. 2017 - Mar. 2024
Nihon University, College of Science and Technology

Computer Analysis
Apr. 2019 - Mar. 2022
Nihon University, College of Science and Technology

Nov. 2023 - Present
The Sosiety of Iodine Science

Jan. 2023 - Present
The Association of Organic Micro-Analysis

Mar. 2018 - Present
Japan Society for Atmospheric Environment

Aug. 2017 - Present
The Society of Separation Process Engineering, Japan

Aug. 2017 - Present
American Chemical Society

Nov. 2015 - Present
Japan Society for Environmental Chemistry

Mar. 2014 - Present
Japanese Society of Food Chemistry

Jun. 2011 - Present
Ion Chromatography Discussion Group of the Japan Society for Analytical Chemistry

Dec. 2010 - Present
The Society of Sea Water Science, Japan

Apr. 2002 - Present
The Japan Society for Analytical Chemistry

Simultaneous multi-component analysis of inorganic ions and organic acids in various samples