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Journal of Chromatography. A|November 15, 2020
Derivatization-based sample-multiplexing for enhancing throughput in liquid chromatography/tandem mass spectrometry quantification of metabolites: an overviewTatsuya Higashi, Shoujiro OgawaThe Journal of Steroid Biochemistry and Molecular Biology|October 11, 2015
Chemical derivatization for enhancing sensitivity during LC/ESI-MS/MS quantification of steroids in biological samples: a reviewTatsuya Higashi, Shoujiro OgawaJournal of Pharmaceutical and Biomedical Analysis|May 15, 2016
Isotope-coded ESI-enhancing derivatization reagents for differential analysis, quantification and profiling of metabolites in biological samples by LC/MS: A reviewTatsuya Higashi, Shoujiro OgawaSteroids|July 11, 2020
3-Epi-25-hydroxyvitamin D3 is a poor substrate for SULT2A1: Analysis of its 3-sulfate in cord plasma and recombinant human SULT2A1 incubateYusuke Yoshimura, Moeka Togashi, Shoujiro Ogawa, et al.Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry|May 2, 2023
Separation and identification of monoglucuronides of vitamin D3 metabolites in urine by derivatization-assisted LC/ESI-MS/MS using a new Cookson-type reagentKazunari Takada, Shoujiro Ogawa, Natsuki Yoshida, et al.Clinica Chimica Acta; International Journal of Clinical Chemistry|October 9, 2012
Influence of saliva flow rate stimulated by gum-chewing on salivary concentrations of catecholamine metabolitesTatsuya Higashi, Masayoshi Hijikuro, Kenichiro Yamagata, et al.Analytical and Bioanalytical Chemistry|August 30, 2014
Analysis of urinary vitamin D₃ metabolites by liquid chromatography/tandem mass spectrometry with ESI-enhancing and stable isotope-coded derivatizationShoujiro Ogawa, Satoshi Ooki, Kenta Shinoda, et al.Steroids|May 22, 2013
Overestimation of salivary 25-hydroxyvitamin D3 level when using stimulated saliva with gum-chewingTatsuya Higashi, Masayoshi Hijikuro, Kenichiro Yamagata, et al.Journal of Pharmaceutical and Biomedical Analysis|July 8, 2014
Enantioselective determination of ibuprofen in saliva by liquid chromatography/tandem mass spectrometry with chiral electrospray ionization-enhancing and stable isotope-coded derivatizationShoujiro Ogawa, Hiroaki Tadokoro, Maho Sato, et al.Journal of Pharmaceutical and Biomedical Analysis|September 11, 2015
Methods for differential and quantitative analyses of brain neurosteroid levels by LC/MS/MS with ESI-enhancing and isotope-coded derivatizationTatsuya Higashi, Naoto Aiba, Tomoya Tanaka, et al.Pageof 7