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Japanese Journal of Ophthalmology|June 20, 2015
Determination of nonsteroidal anti-inflammatory drugs in human tear and plasma samples using ultra-fast liquid chromatography-tandem mass spectrometryMakiko Hirosawa, Takehiko Sambe, Naoki Uchida, et al.
Legal Medicine (Tokyo, Japan)|May 2, 2012
A new method for quantitative determination of dimemorfan in human plasma using monolithic silica solid-phase extraction tipsChika Hasegawa, Takeshi Kumazawa, Masaru Terada, et al.
Journal of Pharmaceutical and Biomedical Analysis|February 3, 2007
Simultaneous determination of methamphetamine and amphetamine in human urine using pipette tip solid-phase extraction and gas chromatography-mass spectrometryTakeshi Kumazawa, Chika Hasegawa, Xiao-Pen Lee, et al.
Rapid Communications in Mass Spectrometry : RCM|July 12, 2008
Determination of diazepam and its metabolites in human urine by liquid chromatography/tandem mass spectrometry using a hydrophilic polymer columnHironobu Umezawa, Xiao-Pen Lee, Yoshiko Arima, et al.
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences|August 9, 2006
Simultaneous determination of selegiline and desmethylselegiline in human body fluids by headspace solid-phase microextraction and gas chromatography-mass spectrometryAyako Kuriki, Takeshi Kumazawa, Xiao-Pen Lee, et al.
Analytical and Bioanalytical Chemistry|August 30, 2011
Determination of dextromethorphan in human plasma using pipette tip solid-phase extraction and gas chromatography-mass spectrometryChika Hasegawa, Takeshi Kumazawa, Seisaku Uchigasaki, et al.
Journal of Separation Science|June 12, 2008
Determination of tricyclic antidepressants in human plasma using pipette tip solid-phase extraction and gas chromatography-mass spectrometryXiao-Pen Lee, Chika Hasegawa, Takeshi Kumazawa, et al.
Biomedical Chromatography : BMC|March 5, 2008
Simultaneous determination of beta-blockers in human plasma using liquid chromatography-tandem mass spectrometryHironobu Umezawa, Xiao-Pen Lee, Yoshiko Arima, et al.
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