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Analysis of the Residues of 20 Organochlorine Pesticides in Herba epimedii, a Chinese Herbal Medicine, by Solid-Phase Extraction with Gas Chromatography/Negative Chemical IonizationMass Spectrometry

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A multiresidue analytical method has been developed to simultaneously determine the residues of 20 organochlorine pesticides in Herba epimedii, a traditional Chinese medicine. The 20 pesticides are included in the list of regulated substances by the Food and Environmental Hygiene Department in Hong Kong. The method consists of solid-phase extraction for cleanup of samples and GC coupled on-line with negative chemical ion-MS to analyze the target pesticides. The chromatographic separation of the compounds was carried out on a DB-1701 column by using an optimal temperature program, and the quantitative analysis was conducted by selected ion monitoring. The LOD and LOQ values fell in the range of 0.05555.8821 and 0.124117.9333 ng/g, respectively. The average recoveries were between 75.4 and 90.7 (n = 5) for the 20 organochlorine pesticides. The developed method proved to be reliable and accurate, and permits rapid determination of the 20 organochlorine pesticides in one run.

Document Type: Research Article

Affiliations: 1: China Pharmaceutical University, Department of Complex Prescription of TCM, Nanjing, China, 210038; Jiangsu Institute for Food and Drug Control, Nanjing, Jiangsu, China, 210008. 2: China Pharmaceutical University, Department of Complex Prescription of TCM, Nanjing, China, 210038. 3: Jiangsu Institute for Food and Drug Control, Nanjing, Jiangsu, China, 210008.

Publication date: January 1, 2010

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  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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