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| Determination of Pyrethroid Pesticide Residues in Environmental Water and Juice Samples by Graphene/Polydimethylsilane Fiber Assisted Headspace Solid-phase Microextraction Coupled with Gas Chromatography |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:graphene/polydimethylsilane headspace solid-phase microextraction pyrethroid pesticides water sample juice sample |
| Author | Institution |
| CUI Yan-hua，YAO Wei-xuan*，ZHANG Su-ling，WANG Hai-dong，ZHONG Fang-fang |
1.湖州市公安局物证鉴定中心;2.浙江警察学院刑事科学技术系;3.杭州电子科技大学材料与环境工程学院 |
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| Abstract: |
| A graphene/polydimethylsilane（graphene/PDMS） fiber assisted headspace solid-phase microextraction combined with gas chromatographic method was developed for the determination of six pyrethroid pesticide residues in environmental water and juice samples.This fiber exhibited a higher adsorption affinity toward pyrethroid pesticides than commercial polydimethylsilane（PDMS） and polypropylene（PA） fibers.Several parameters affecting the extraction efficiency for six pyrethroid pesticides，including extraction temperature，ionic strength，extraction time and desorption time，were optimized in sequential order using the graghene/PDMS fiber.The analytical evaluation parameters for six pyrethroid pesticides were studied under the optimized conditions.This method showed wide linearities（0.02-5 μg/L for allethrin and bifenthrin,0.1-20 μg/L for fenpropathrin，cypermethrin and fenvalerate,0.2-20 μg/L for deltamethrin），low detection limits（6.8-58.2 ng/L），low quantitation limits（18.2-154.9 ng/L） and high correlation coefficients（r2>0.99）.The relative standard deviations（RSD） for five replicate extractions were not more than 9.2% using one fiber，and the repeatability of fiber-to-fiber were in the range of 6.7%-10.8%.The method was applied in the simultaneous analysis of six pyrethroid pesticide residues in environmental water and juice samples.The recoveries for river water，fishpond water，apple juice and orange juice were in the range of 81.6%-92.9%，82.3%-96.1%，78.2%-92.8%and 79.9%-91.7%，respectively.This method was sensitive and simple，and could meet the actual requirement for the analysis of trace analytes in environmental water and concentrated fruit juice samples. |
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