Shoujiro Ogawa

Unconjugated bile acids in rat brain: Analytical method based on LC/ESI-MS/MS with chemical derivatization and estimation of their origin by comparison to serum levels

Tatsuya Higashi, Shui Watanabe, Koki Tomaru et al. · Steroids · 2017 · 95 citations

Biochemistry, Biliary Tract, Bioanalysis +8

A novel Cookson‐type reagent for enhancing sensitivity and specificity in assessment of infant vitamin D status using liquid chromatography/tandem mass spectrometry

Shoujiro Ogawa, Satoshi Ooki, Misato Morohashi et al. · Rapid Communications in Mass Spectrometry · 2013 · 60 citations

Development and validation of the simultaneous measurement of four vitamin D metabolites in serum by LC–MS/MS for clinical laboratory applications

Mamoru Satoh, Takayuki Ishige, Shoujiro Ogawa et al. · Analytical and Bioanalytical Chemistry · 2016 · 45 citations

Micronutrients, Medicine, Clinical Laboratory Applications +12

Analysis of urinary vitamin D3 metabolites by liquid chromatography/tandem mass spectrometry with ESI-enhancing and stable isotope-coded derivatization

Shoujiro Ogawa, Satoshi Ooki, Kenta Shinoda et al. · Analytical and Bioanalytical Chemistry · 2014 · 42 citations

Urology, Biochemistry, Bioanalysis +12

Development and validation of a method for determination of plasma 25-hydroxyvitamin D3 3-sulfate using liquid chromatography/tandem mass spectrometry

Tatsuya Higashi, Ayaka Goto, Misato Morohashi et al. · Journal of Chromatography B · 2014 · 40 citations

Medicine, Bioanalysis, Mass Spectrometry +4