Multiresidue analysis of 18 organochlorine pesticides in traditional chinese medicine.
TLDR
A simple and efficient method for simultaneous gas chromatographic (GC) determination of 18 organochlorine pesticide determination in Traditional Chinese Medicine (TCM) is described and may be used to routinely determine organoch chlorine pesticides in TCM.Abstract:
A simple and efficient method for simultaneous gas chromatographic (GC) determination of 18 organochlorine pesticides [tecnazene, hexachlorobenzene, alpha-benzenehexachloride (BHC), pentachloronitrobenzene (PCNB), gamma-BHC, heptachlor, aldrin, methyl pentachlorophenyl sulfide, beta-BHC, delta-BHC, heptachlor epoxide, alpha-endosulfan, trans-chlorodane, cis-chlorodane, p,p'-dichlorodiphenyl dichloroethylene, o,p'-DDT, p,p'-DDD, and p,p'-DDT] in Traditional Chinese Medicine (TCM) is described. The procedure involves ultrasonic extraction and sulphuric acid treatment as the cleanup method. Detection of the sample is performed by GC-electron capture detection. A series of experiments are conducted to optimize the final pretreatment conditions [acetone-petroleum ether (1:1) as the extract solvent, ultrasonication for 15 min, three steps, concentrated sulphuric acid with 10% water for sulphuric acid treatment]. Recovery studies are performed at 10, 50, and 100 parts-per-billion (ppb) fortification levels of each organochlorine pesticide, except for alpha-endosulfan, which are 20, 100, and 200 ppb. The percentage recoveries range from 77.9% +/- 6.4% to 114.0% +/- 8.1% (average +/- standard deviation). The simple and rapid method may be used to routinely determine organochlorine pesticides in TCM.read more
Citations
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Residues of 18 organochlorine pesticides in 30 traditional Chinese medicines
TL;DR: The results suggest that contamination of TCMs with OCPs is widespread and the most common contaminants among the 280 samples were alpha-BHC, PCNB, hexachlorobenzene, and tecnazene.
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The evaluation of a fast and simple pesticide multiresidue method in various herbs by gas chromatography
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TL;DR: MSPD proves to be a simple, fast and very useful multiresidue method and can be recommended for routine pesticide monitoring studies in various herbs.
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Residues of organochlorine pesticides in surface soil and raw foods from rural areas of the Republic of Tajikistan.
Mace G. Barron,Zebunisso J. Ashurova,Mukhamadcho A. Kukaniev,Hakbarqul K. Avloev,Karim K. Khaidarov,Jamshed N. Jamshedov,Oygul S. Rahmatullova,Sunbula S. Atolikshoeva,Sakina S. Mamadshova,Oksana Manzenyuk +9 more
TL;DR: Soil concentrations of pesticides were extremely heterogeneous at the Vakhsh and Konibodam disposal sites with many soil samples greater than 10 ppm, indicating minimal transfer from the pesticide sites into local food chains.
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A holistic strategy for quality and safety control of traditional Chinese medicines by the "iVarious" standard system.
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