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2014•Shipin anquan zhiliang jiance xuebaoRequires access

Determination of cypermethrin pesticide in lettuce

Shi Shao

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Abstract

Objective To establish a method for determination of cypermethrin pesticide in lettuce. Methods Samples were extracted with acetonitrile, purified by Agilent SPE, Florisil column, NH2 column and C18 column, respectively, and detected by capillary column gas chromatography with ECD as detector. Results Recoveries of cypermethrin were 91.21%～102.78% with coefficient of variation of 0.63%～3.57%. The lowest detection limit was 0.001 mg·kg-1. Conclusion The method is simple, sensitive, accurate and reproducible, and the separation of cypermethrin cis-cypermethrin and trans-cypermethrin 2:3 bimodal peak is very satisfactory. This method can be used to detect residues of cypermethrin in lettuce.

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What this paper is about

Objective To establish a method for determination of cypermethrin pesticide in lettuce. Methods Samples were extracted with acetonitrile, purified by Agilent SPE, Florisil column, NH2 column and C18 column, respectively, and detected by capillary column gas chromatography with ECD as detector. Results Recoveries of cypermethrin were 91.21%～102.78% with coefficient of variation of 0.63%～3.57%. The lowest detection limit was 0.001 mg·kg-1. Conclusion The method is simple, sensitive, accurate and reproducible, and the separation of cypermethrin cis-cypermethrin and trans-cypermethrin 2:3 bimodal peak is very satisfactory. This method can be used to detect residues of cypermethrin in lettuce.

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Available abstract

Objective To establish a method for determination of cypermethrin pesticide in lettuce. Methods Samples were extracted with acetonitrile, purified by Agilent SPE, Florisil column, NH2 column and C18 column, respectively, and detected by capillary column gas chromatography with ECD as detector. Results Recoveries of cypermethrin were 91.21%～102.78% with coefficient of variation of 0.63%～3.57%. The lowest detection limit was 0.001 mg·kg-1. Conclusion The method is simple, sensitive, accurate and reproducible, and the separation of cypermethrin cis-cypermethrin and trans-cypermethrin 2:3 bimodal peak is very satisfactory. This method can be used to detect residues of cypermethrin in lettuce.

Key concepts: Cypermethrin, Chromatography, Chemistry, Detection limit, Pesticide, Pesticide residue, Coefficient of variation, Biology

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