title: Simultaneous Determination of β-Cypermethrin and Its Metabolite 3-Phenoxybenzoic Acid in Microbial Degradation Systems by HPLC-UV.
abstract: The wide use of pesticides in agriculture is necessary to guarantee adequate food production worldwide. However, pesticide residues have caused global concern because of their potential health risk to consumers. In this study, we could identify β-cypermethrin (β-CY) and its degradation product 3-phenoxybenzoic acid (3-PBA) by liquid chromatograph-mass spectrometry. Few studies on the simultaneous determination of β-CY and its metabolites have been carried out so far; hence, we established a high-performance liquid chromatography method to determine the concentrations of both β-CY and 3-PBA simultaneously in microbial degradation systems. In this study, a novel β-CY degrading strain, Bacillus licheniformis B-1, was isolated from a tea garden soil, utilizing β-CY as a growth substrate. Good linear relationships between β-CY and 3-PBA were observed and the concentrations of reference solutions were between 0.50 and 60.00 µg/mL. Satisfactory stability and intra- and interday precision were obtained. The limits of detection were 0.06 and 0.13 µg/mL for β-CY and 3-PBA, respectively, and the corresponding limits of quantification were 0.21 and 0.34 µg/mL, respectively. Spiking recoveries for β-CY varied from 98.38 to 105.80%, with relative standard deviations (RSDs) varying from 1.49 to 3.93%. Spiking recoveries for 3-PBA varied from 99.59 to 101.20%, with RSDs varying from 0.58 to 3.64%. The proposed method has advantages of simplicity, rapidity, high accuracy, good separation and reproducibility; thus, it is ideally suitable for simultaneous determination of β-CY and 3-PBA in microbial degradation systems.
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.|Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Li
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Derong
authors.initials: D
authors.lastname: Lin
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Ran
authors.initials: R
authors.lastname: Ji
authors.affiliation: College of Light Industry and Food, Sichuan University, Chengdu, Sichuan 610065, P.R. China.
authors.forename: Kai
authors.initials: K
authors.lastname: Yao
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Wei-Qin
authors.initials: WQ
authors.lastname: Deng
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Huaiyu
authors.initials: H
authors.lastname: Yuan
authors.affiliation: College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P. R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wu
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Qiusi
authors.initials: Q
authors.lastname: Jia
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Peiwen
authors.initials: P
authors.lastname: Luo
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Kang
authors.initials: K
authors.lastname: Zhou
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Li
authors.initials: L
authors.lastname: He
authors.affiliation: The Laboratory of Microbiology, Dujiangyan Campus, Sichuan Agricultural University, Dujiangyan, Sichuan 611830, P.R. China.
authors.forename: Likou
authors.initials: L
authors.lastname: Zou
authors.affiliation: College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, P.R. China.
authors.forename: Shuliang
authors.initials: S
authors.lastname: Liu