Toshimasa Toyo’oka

Dried Saliva Spot (DSS) as a Convenient and Reliable Sampling for Bioanalysis: An Application for the Diagnosis of Diabetes Mellitus

Masahiro Numako, Takahiro Takayama, Ichiro Noge et al. · Analytical Chemistry · 2015 · 50 citations

Food Analysis, Diagnosis, Dss Analysis +17

Metabolomics approach of infant formula for the evaluation of contamination and degradation using hydrophilic interaction liquid chromatography coupled with mass spectrometry

Kōichi Inoue, Chihiro Tanada, Tasuku Sakamoto et al. · Food Chemistry · 2015 · 45 citations

Gas Chromatography, Infant Formula, Medicine +14

Novel chiral derivatization reagents possessing a pyridylthiourea structure for enantiospecific determination of amines and carboxylic acids in high-throughput liquid chromatography and electrospray-ionization mass spectrometry for chiral metabolomics identification

Ryuji Nagao, Haruhito Tsutsui, Toshiki Mochizuki et al. · Journal of Chromatography A · 2013 · 45 citations

Biochemistry, Medicine, Mass Spectrometry +10

Determination of psilocybin in hallucinogenic mushrooms by reversed-phase liquid chromatography with fluorescence detection

Kimie Saito, Toshimasa Toyo’oka, Masaru Kato et al. · Talanta · 2005 · 33 citations

Fluorescence Detection, Biochemistry, Reversed-phase Liquid Chromatography +8

Salivary chenodeoxycholic acid and its glycine-conjugate: Their determination method using LC–MS/MS and variation of their concentrations with increased saliva flow rate

Tatsuya Higashi, Yujin Shibayama, Takuya Ichikawa et al. · Steroids · 2010 · 33 citations

Biochemistry, Medicine, Bioanalysis +8