Xiao‐Pen Lee

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

Takeshi Kumazawa, Xiao‐Pen Lee, Keizo Sato et al. · Analytica Chimica Acta · 2003 · 116 citations

Pharmacy, Chemistry, Pharmaceutical Analysis +16

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 · 103 citations

Pharmacy, Pharmacology, Toxicology +14

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 · 99 citations

Pharmacy, Pharmaceutical Analysis, Pharmacology +10

Determination of paraquat and diquat in human body fluids by high‐performance liquid chromatography/tandem mass spectrometry

Xiao‐Pen Lee, Takeshi Kumazawa, Masaya Fujishiro et al. · Journal of Mass Spectrometry · 2004 · 57 citations

Pharmacy, Pharmaceutical Analysis, Toxicology +17

Pipette tip solid-phase extraction and gas chromatography – mass spectrometry for the determination of methamphetamine and amphetamine in human whole blood

Chika Hasegawa, Takeshi Kumazawa, Xiao‐Pen Lee et al. · Analytical and Bioanalytical Chemistry · 2007 · 56 citations

Pharmacy, Pharmacology, Toxicology +16