Toshimasa Toyo’oka

Simple and practical derivatization procedure for enhanced detection of carboxylic acids in liquid chromatography–electrospray ionization-tandem mass spectrometry

Tatsuya Higashi, Takuya Ichikawa, Shinsuke Inagaki et al. · Journal of Pharmaceutical and Biomedical Analysis · 2010 · 111 citations

Carboxylic Acids, Enhanced Detection, Engineering +11

Towards the chiral metabolomics: Liquid chromatography–mass spectrometry based dl-amino acid analysis after labeling with a new chiral reagent, (S)-2,5-dioxopyrrolidin-1-yl-1-(4,6-dimethoxy-1,3,5-triazin-2-yl)pyrrolidine-2-carboxylate, and the application to saliva of healthy volunteers

Toshiki Mochizuki, Takahiro Takayama, Kenichiro Todoroki et al. · Analytica Chimica Acta · 2015 · 62 citations

Liquid Chromatography–mass Spectrometry, Biochemistry, Medicine +15

Simultaneous determination of α-lipoic acid and its reduced form by high-performance liquid chromatography with fluorescence detection

Soichiro Satoh, Toshimasa Toyo’oka, Takeshi Fukushima et al. · Journal of Chromatography B · 2007 · 46 citations

Lipid Analysis, Fluorescence Detection, Biochemistry +13

Rapid, sensitive and simultaneous determination of fluorescence-labeled polyamines in human hair by high-pressure liquid chromatography coupled with electrospray-ionization time-of-flight mass spectrometry

Koichi Sugiura, Jun Zhe Min, Toshimasa Toyo’oka et al. · Journal of Chromatography A · 2008 · 28 citations

Biochemistry, Medicine, High-pressure Liquid Chromatography +8

Determination of dicyandiamide in infant formula by stable isotope dilution hydrophilic interaction liquid chromatography with tandem mass spectrometry

Kōichi Inoue, Tasuku Sakamoto, Jun Zhe Min et al. · Food Chemistry · 2014 · 24 citations

Biochemistry, Gas Chromatography, Infant Formula +12