title: 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.
authors.affiliation: China Pharmaceutical University, Department of Complex Prescription of TCM, Nanjing, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Guo
authors.forename: Ming
authors.initials: M
authors.lastname: Deng
authors.forename: Boyang
authors.initials: B
authors.lastname: Yu
authors.forename: Li
authors.initials: L
authors.lastname: Tan