A Method for Determination of Imidacloprid Residue in Tea with HPLC-UV

HOU Ru-yan; ZHU Xu-jun; ZHANG Zheng-zhu; CAI Hui-mei; WAN Xiao-chun

doi:10.13305/j.cnki.jts.2009.1.011

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Journal of Tea Science ›› 2009, Vol. 29 ›› Issue (1) : 67-71. DOI: 10.13305/j.cnki.jts.2009.1.011

A Method for Determination of Imidacloprid Residue in Tea with HPLC-UV

HOU Ru-yan, ZHU Xu-jun, ZHANG Zheng-zhu, CAI Hui-mei, WAN Xiao-chun^*

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Abstract

A method was developed for determination of imidacloprid residue in tea by high performance liquid chromatography (HPLC) with UV detector. Imidacloprid in tea samples was extracted with methyl alcohol and re-extracted by dichloromethane then cleaned up with the ENVI-18 cartridge. Imdacloprid was eluted with acetonitrile:water(v/v, 30:70) solution from the cartridge and detected with HPLC. The recovery of imidacolprid ranged from 81.5%~87.9% with the RSD less than 10.2%. Practical determination limit was 0.05 mg/kg.

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HPLC / imidacloprid / pesticide residues / tea

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HOU Ru-yan, ZHU Xu-jun, ZHANG Zheng-zhu, CAI Hui-mei, WAN Xiao-chun. A Method for Determination of Imidacloprid Residue in Tea with HPLC-UV[J]. Journal of Tea Science. 2009, 29(1): 67-71 https://doi.org/10.13305/j.cnki.jts.2009.1.011

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