Determination of Organochlorine and Organophosphorus Pesticide Residues in Vegetables by Gas Chromatography Coupled with Solid phase Microextraction Fiber Based on Allyl-o-cucurbit[7]uril
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Determination of Organochlorine and Organophosphorus Pesticide Residues in Vegetables by Gas Chromatography Coupled with Solid phase Microextraction Fiber Based on Allyl-o-cucurbit[7]uril
Vol. 38, Issue 11, Pages: 1340-1346(2019)
作者机构:
1. 贵州大学化学与化工学院
2. 贵州省草地技术试验推广站
3. Commonwealth Scientific and Industrial Research Organization
4. Manufacturing
5. 贵州大学贵州省大环化学及超分子化学重点实验室
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Determination of Organochlorine and Organophosphorus Pesticide Residues in Vegetables by Gas Chromatography Coupled with Solid phase Microextraction Fiber Based on Allyl-o-cucurbit[7]uril. [J]. 38(11):1340-1346(2019)
DOI:
Determination of Organochlorine and Organophosphorus Pesticide Residues in Vegetables by Gas Chromatography Coupled with Solid phase Microextraction Fiber Based on Allyl-o-cucurbit[7]uril. [J]. 38(11):1340-1346(2019)DOI:
Determination of Organochlorine and Organophosphorus Pesticide Residues in Vegetables by Gas Chromatography Coupled with Solid phase Microextraction Fiber Based on Allyl-o-cucurbit[7]uril
A gas chromatography with flame ionization detector(GC/FID) was developed for the determination of ten organochlorine and organophosphorus pesticide residues in vegetable samples based on a polydimethylsiloxane(PDMS)/allyl o cucurbit[7]uril(Q7-OCH2CH‖CH2) coated solid phase microextraction(SPME) fiber.The PDMS/Q7-OCH2CH‖CH2 coated SPME fiber was fabricated with Q7-OCH2CH‖CH2 and hydroxyl terminated polydimethylsiloxane(OH-PDMS) as stationary phases and γ-methacryloxypropyltrimethoxylsilane(KH570) as bridge reagent by sol-gel method and cross-linking technique.The limits of detection of the developed method were in the range of 0.01-0.08 mg/kg for the target pesticide residues,and the limits of quantitation ranged from 0.03 mg/kg to 0.26 mg/kg with an enrichment factor of 14-67 fold.The mean recoveries(n=3) at low,medium and high three spiked levels ranged from 61.3%to 120%,with intra percision and inter precision both in the range of 46%-99%(n=5,spiked 50 mg/kg).The proposed method was simple and sensitive,and was suitable for the simultaneous analysis of organochlorine and organophosphorus pesticide residues in vegetables.