标题：Simple and Rapid Determination of Organochlorine Pesticide Residues in Kampo Products by Gas Chromatography/Mass Spectrometry with Negative Chemical Ionization
摘要：A simple, rapid and inexpensive sample preparation method using extraction by shaking and sulfuric acid treatment was developed for determining eight organochlorine pesticides in kampo products by gas chromatography/mass spectrometry with negative chemical ionization. The recoveries were between 71% and 117%, and most relative standard deviations were less than 10%. The proposed method was applied to twenty-three samples of kampo formulae, and no samples were contaminated by eight organochlorine pesticides over the quantification limit.
