XÁC ĐỊNH DƯ LƯỢNG CÁC HÓA CHẤT BẢO VỆ THỰC VẬT TRONG NÔNG SẢN CÓ NGUỒN GỐC THỰC VẬT NHẬP KHẨU BẰNG SẮC KÝ LỎNG GHÉP HAI LẦN KHỐI PHỔ

Tóm tắt

     A rapid, simple and accurate method based on QuEChERS extraction and liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed for determination of pesticide multi-residues in the imported agricultural products origin of plants. Thirty six pesticides were identified and quantified by 6430 triple quadrupole mass spectrometer coupled to an Agilent LC1200 high performance liquid chromatography system. To minimize the matrix effect, the matrix matched calibration technique was used. The method showed good performance in the concentration range from 0.004 to 0,16 mg/kg. The LOQs were lower than 0.01 mg/kg for all pesticides. Spike recoveries were from 70 to 114% and the repeatabilities were lower than 13% RSD. The method has been applied for many types of imported agricultural products origin of plants including orange, tangerine, grape, pomegranate, carrot, apple, cabbage, cherry, mangosteen, cauliflower, tomato and pear.

Từ khóa: Hóa chất bảo vệ thực vật, sắc ký lỏng, khối phổ, LC-MS/MS