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Determination of BHC and DDT Pesticide Residues in Cinnamomum Cassia Bark by Solid-phase Extraction and Capillary Gas Chromatography |
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DOI:10.3969/j.issn.1004-4957.年份.月份 |
KeyWord:cinnamomum cassia bark BHC DDT pesticide residues solid-phase extraction capillary gas chromatography |
Author | Institution |
刘桂宁,强维 ,钟闱桢,文新 |
1.梧州出入境检验检疫局;2.上海安谱科学仪器有限公司 |
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Abstract: |
A solid-phase extraction and capillary gas chromatographic method was developed for the determination of BHC & DDT pesticide residues in cinnamomum cassia bark.The pesticide residues were extracted by vortex oscillation using acetone-petroleum ether mixed solvent as extraction agent,and the extract was purified by solid-phase extraction technology.The proportion and dosage of the elution solvent were optimized,and the detection of targeted compounds was performed by GC/μECD.Under the optimal conditions,the calibration curves were linear in the range of 10-1 000 μg/L ,with correlations coefficients of 0.995 8-0.998 1.The average recoveries for BHC and DDT were in the range of 92.1%-112% with RSDs(n=5) of 2.8%-8.1%.The limits of detection(LODs) were 5.0×10-3-2.4×10-2 mg?kg-1,and the limits of quantitations(LOQs) were 1.3×10-2-6.0×10-2 mg?kg-1.The method was simple,sensitive,accurate and reproducible. |
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