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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.

journal of aoac international

Direct Determination of Atrazine Residue on Chinese Cabbage Leaf Using Desorption Electrospray Ionization-Tandem Mass Spectrometry and Its Application for Diagnosing Atrazine Drift Phytotoxicity