title: Direct determination of atrazine residue on Chinese cabbage leaf using desorption electrospray ionization-tandem mass spectrometry and its application for diagnosing atrazine drift phytotoxicity.
abstract: A method was developed for the determination of atrazine residue and phytotoxicity on a nontargeted plant, the Chinese cabbage. The analysis was done by desorption electrospray ionization combined with ion trap MS/MS. Within the range of 63.13 to 2525 pg/mm2 of atrazine on the specimen, the linear relationship of the average peak area of extracted product ion m/z 174 (y) versus the surface concentration of atrazine (x) was estimated as y = 5066.5x - 85779; r was 0.9994, with RSD between 3.37 and 26.17%. The LOQ of atrazine on the leaf surface was lower than 63.13 pg/mm2. The method is highly applicable to detect atrazine residue and evaluate atrazine phytotoxicity on Chinese cabbage leaf with good accuracy, selectivity, sensitivity, and specificity.
authors.affiliation: China Agricultural University, College of Science, Department of Applied Chemistry, Beijing, 100193, People's Republic of China. zxz.1982@163.com
authors.forename: Xin-Zhong
authors.initials: XZ
authors.lastname: Zhang
authors.forename: Chong-Jiu
authors.initials: CJ
authors.lastname: Li
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Chen
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Han
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Ma
mesh_terms: D001280:Atrazine / Q000032:analysis*; D001937:Brassica / Q000187:drug effects / Q000378:metabolism; D002623:Chemistry Techniques, Analytical; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination; D005740:Gases; D013058:Mass Spectrometry / Q000379:methods; D010573:Pesticide Residues / Q000032:analysis; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013997:Time Factors
chemical_list: D005740:Gases; D010573:Pesticide Residues; D001280:Atrazine