Analysis of the residues of 20 organochlorine pesticides in Herba epimedii, a Chinese herbal medicine, by solid-phase extraction with gas chromatography/negative chemical ionization-mass spectrometry.
Guo
Qing
Q
China Pharmaceutical University, Department of Complex Prescription of TCM, Nanjing, China.
Deng
Ming
M
Yu
Boyang
B
Tan
Li
L