Takeshi Kumazawa

Determination of Cyanide in Whole Blood by Capillary Gas Chromatography with Cryogenic Oven Trapping

Akira Ishii, Hiroshi Seno, Kanako Watanabe‐Suzuki et al. · Analytical Chemistry · 1998 · 163 citations

Levels of pyrroloquinoline quinone in various foods

Takeshi Kumazawa, Kazuomi Sato, Hiroshi Seno et al. · Biochemical Journal · 1995 · 157 citations · Full text

Food Contaminant, Free Pyrroloquinoline Quinone, Food Toxicology +20

Solid-phase microextraction and liquid chromatography/mass spectrometry in drug analysis

Takeshi Kumazawa, Xiao‐Pen Lee, Keizo Sato et al. · Analytica Chimica Acta · 2003 · 115 citations

Gas Chromatography, Medicine, Mass Spectrometry +7

Simultaneous determination of methamphetamine and amphetamine in human urine using pipette tip solid-phase extraction and gas chromatography–mass spectrometry

Takeshi Kumazawa, Chika Hasegawa, Xiao‐Pen Lee et al. · Journal of Pharmaceutical and Biomedical Analysis · 2007 · 102 citations

Human Urine, Gas Chromatography–mass Spectrometry, Medicine +11

Simultaneous determination of ten antihistamine drugs in human plasma using pipette tip solid‐phase extraction and gas chromatography/mass spectrometry

Chika Hasegawa, Takeshi Kumazawa, Xiao‐Pen Lee et al. · Rapid Communications in Mass Spectrometry · 2006 · 98 citations