Kazuichi Hayakawa | Researchain

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Eisei kagaku | 1994

Recent Advancement of Ion Chromatography.

Kazuichi Hayakawa; Atsushi Yamamoto; Motoichi Miyazaki

Ion chromatography (IC), which was introduced in 1975, has become widely used for the sensitive and simultaneous determination of ions. In the early stage, the IC system consisted of two ion-exchange columns (separator and suppressor, respectively) and a conductivity detector. Although this combination is still the most popular, new forms of separation and suppression have been developed. On the other hand, an indirect photometric detection using a UV detector has become popular in IC and other detectors commonly used in HPLC also have been used. Each of them has specific advantages for different types of analyses. Thus, IC is now defined as a form of liquid chromatography of ions. This article reviews new developments of the different forms of IC and their applications, especially to environmental samples, foods, biological materials and drugs, from reports published since 1990.

Chemical & Pharmaceutical Bulletin | 1977

Relationship between Neurological Symptoms and Concentrations of Clioquinol in Serum and Nervous Systems of Beagle Dogs

Kazuichi Hayakawa; Toshio Imanari; Zenzo Tamura; Shigetoshi Kuroda; Hisao Ikeda; Jun Tateishi

Eisei kagaku | 1991

High-performance liquid chromatographic method with chemiluminescence detection for methamphetamines in the human urine.

Nariaki Takayama; Kazuichi Hayakawa; Hiroshi Kobayashi; Motoichi Miyazaki

Chemical & Pharmaceutical Bulletin | 1975

Analysis of 5-Chloro-7-iodo-8-quinolinol Conjugates by High Performance Liquid Chromatography

Chingtan Chen; Kazuichi Hayakawa; Toshio Imanari; Zenzo Tamura

Eisei kagaku | 1995

Behavior of Mutagenic Nitroarenes in Urban Air (Proceedings of the 20th Symposium on Toxicology and Environmental Health)

Kazuichi Hayakawa; Tsuyoshi Murahashi; Motoichi Miyazaki

Japanese Journal of Pharmacology | 1976

NONSPECIFIC INHIBITORY ACTION OF CHINOFORM ON GASTROINTESTINE

Issei Takayanagi; Kazuichi Hayakawa; Yasufumi Terawaki; Zenzo Tamura; Keijiro Takagi

Chemical & Pharmaceutical Bulletin | 1976

Hydrolysis of 5-Chloro-7-iodo-8-quinolinol Conjugates catalyzed by Metal Ions

Kazuichi Hayakawa; Chingtan Chen; Toshio Imanari; Zenzo Tamura

Archive | 2011

— Rapid Communication — Mutagenicities and Endocrine-disrupting Activities of 1-Hydroxy-2-nitropyrene and 1-Hydroxy-5-nitropyrene

Takayuki Kameda; Ayuko Akiyama; Morio Yoshita; Chihiro Tachikawa; Akira Toriba; Ning Tang; Kazuichi Hayakawa

大気環境学会年会講演要旨集 | 2009

P-12 Seasonal variations of main sources of atmospheric polycyclic aromatic hydrocarbons and nitropolycyclic aromatic hydrocarbons at Noto Peninsula(Poster session)

Ning Tang; Kousuke Sato; Takayuki Kameda; Akira Toriba; Kazuichi Hayakawa

金沢大学大学院自然科学研究科環境科学専攻紀要 = Memoirs of Division of Environmental Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University | 2006