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Dive into the research topics where Motohiro Imaizumi is active.

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Featured researches published by Motohiro Imaizumi.


Electrophoresis | 2001

Capillary electrophoresis method for the analysis of inorganic anions, organic acids, amino acids, nucleotides, carbohydrates and other anionic compounds.

Tomoyoshi Soga; Motohiro Imaizumi

A previously developed capillary zone electrophoresis (CZE) method with indirect UV detection for the simultaneous determination of inorganic and organic anions, amino acids and carbohydrates using 20 mM 2,6‐pyridinedicarboxylic acid (PDC) as the background electrolyte was extended to allow determination of 206 anions including those above – mentioned and physiological amino acids, nucleotides, aromatic acids, haloacetic acids, alcohols, phosphorylated saccharides, oxyhalides, metal oxoacids, metal‐ethylenediaminetetraacetic acid (EDTA) complexes, forensic anions, Goods buffers and herbicides. Every compound could be analyzed and their electrophoretic mobility determined simply by selecting detection wavelength. This method is simple and universal for anion analysis, and could be readily applied to the simultaneous determination of anionic compounds. In this work, it was used to identify and quantify important anions in sea urchin and sake.


Journal of Chromatography A | 2002

Polymer-coated synthetic fibers designed for miniaturized sample preparation process

Yoshihiro Saito; Masatoshi Nojiri; Motohiro Imaizumi; Yuji Nakao; Yoriko Morishima; Hideyuki Kanehara; Hisashi Matsuura; Kenzo Kotera; Hiroo Wada; Kiyokatsu Jinno

Miniaturized sample preparation technique for complex sample matrices has been developed with a polymer-coated fibrous extraction medium. Several hundreds of fine fibrous materials were packed longitudinally into a fused-silica capillary followed by a polymeric coating on it to prepare the extraction capillary. The extraction capillary was installed in a liquid chromatograph as a sample loop of the injection valve. The on-line coupled sample preparation/separation system demonstrated a good validity for the analysis of phthalates in real river and wastewater samples. The lowest limits of quantification for several phthalates were less than 1 ng/ml. The effect of polymeric coating to the filaments on the extraction power was also investigated.


Journal of Pharmaceutical and Biomedical Analysis | 2003

Polymer-coated fibrous extraction medium for sample preparation coupled to microcolumn liquid-phase separations

Motohiro Imaizumi; Yoshihiro Saito; Makiko Hayashida; Tsutomu Takeichi; Hiroo Wada; Kiyokatsu Jinno

Polymer-coated fibrous material has been introduced as the extraction medium for a miniaturized sample preparation method being coupled with microcolumn liquid chromatography. The preconcentration and the subsequent liquid chromatographic separation of tricyclic antidepressants (TCAs) drugs, amitriptyline, imipramine, nortriptyline and desipramine, was carried out with the hyphenated system. Several basic experimental parameters, such as extraction and separation conditions, were investigated along with the applicability of the method for the analysis of biological fluids. The results clearly showed that the on-line coupled system could be a powerful tool for the analysis of complex mixtures in biological matrix without a large solvent consumption and specially designed instruments. The lowest limit of quantification was quite acceptable for the analysis of TCAs in clinical and forensic situations.


Fresenius Journal of Analytical Chemistry | 2000

Fiber-in-tube solid-phase microextraction: a fibrous rigid-rod heterocyclic polymer as the extraction medium

Yoshihiro Saito; Yuji Nakao; Motohiro Imaizumi; Tsutomu Takeichi; Yoshiaki Kiso; Kiyokatsu Jinno


Analytical and Bioanalytical Chemistry | 2002

Miniaturized solid-phase extraction as a sample preparation technique for the determination of phthalates in water

Yoshihiro Saito; Yuji Nakao; Motohiro Imaizumi; Yoriko Morishima; Yoshiaki Kiso; Kiyokatsu Jinno


Analytical and Bioanalytical Chemistry | 2002

Miniaturized fiber-in-tube solid-phase extraction as the sample preconcentration method for microcolumn liquid-phase separations

Yoshihiro Saito; Motohiro Imaizumi; Tsutomu Takeichi; Kiyokatsu Jinno


Analytical Sciences | 2002

Miniaturized Sample Preparation and Separation Methods for Environmental and Drug Analyses

Yoshihiro Saito; Maki Kawazoe; Motohiro Imaizumi; Yoriko Morishima; Yuji Nakao; Kayo Hatano; Makiko Hayashida; Kiyokatsu Jinno


Journal of Chromatography A | 2004

Development of miniaturized sample preparation with fibrous extraction media

Yoshihiro Saito; Motohiro Imaizumi; Kazuhiro Ban; Ai Tahara; Hiroo Wada; Kiyokatsu Jinno


Analytical Chemistry | 2003

Polymer-coated fibrous materials as the stationary phase in packed capillary gas chromatography.

Yoshihiro Saito; Ai Tahara; Motohiro Imaizumi; Tsutomu Takeichi; Hiroo Wada; Kiyokatsu Jinno


Journal of Microcolumn Separations | 2001

Fibrous rigid‐rod heterocyclic polymer as the stationary phase in packed capillary gas chromatography

Yoshihiro Saito; Motohiro Imaizumi; Kaori Nakata; Tsutomu Takeichi; Kenzo Kotera; Hiroo Wada; Kiyokatsu Jinno

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Kiyokatsu Jinno

Toyohashi University of Technology

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Yoshihiro Saito

Toyohashi University of Technology

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Hiroo Wada

Kyoto Institute of Technology

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Tsutomu Takeichi

Toyohashi University of Technology

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Kazuhiro Ban

Toyohashi University of Technology

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Mitsuhiro Ogawa

Toyohashi University of Technology

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Yuji Nakao

Toyohashi University of Technology

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Ai Tahara

Toyohashi University of Technology

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Akira Abe

Toyohashi University of Technology

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