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Multiresidue Determination of Six Pesticide Adjuvants in Characteristic Minor Crops Using QuEChERS Method and Gas Chromatography‐Mass Spectrometry
Author(s) -
Qi Yan,
Ma Cong,
Wan Mengfei,
Liu Zhongdong,
Zheng Lufei,
Jin Fen,
Jin Maojun,
She Yongxin,
Wang Jing,
Wang Shanshan
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803328
Subject(s) - quechers , chromatography , chemistry , gas chromatography–mass spectrometry , mass spectrometry , gas chromatography , toluene , xylene , pesticide , detection limit , pesticide residue , benzene , amine gas treating , organic chemistry , agronomy , biology
A new multiresidue analysis method using a quick, easy, cheap, effective, rugged, and safe (QuEChERS) procedure for the determination of 6 pesticide adjuvants (toluene, p ‐xylene, o ‐xylene, m ‐xylene, N, N ‐dimethylformamide (DMF) and dimethyl sulphoxide (DMSO) in characteristic minor crops was developed via gas chromatography‐mass spectrometry (GC‐MS). Matrices, including lily bulb, millet, and Chinese yam, were extracted with CH 3 CN/CH 3 CN‐H 2 O and then cleaned up by primary secondary amine (PSA), followed by GC‐MS analysis with selected ion monitoring (SIM) mode. Under the optimal conditions, the established QuEChERS‐GC/MS method showed good linearity (r>0.998) for all targets with limits of detection of 0.001‐0.005 mg kg ‐1 for benzene compounds, 0.012‐0.022 mg kg ‐1 for DMF, and 0.012‐0.024 mg kg ‐1 for DMSO, respectively. The average recoveries in the three characteristic minor crop samples ranged from 72.9% to 94.9% with relative standard deviations from 2.4% to 9.9%. The method is demonstrated to be accurate, sensitive, and convenient and thus could be applied for routinely monitoring multiresidues of pesticide adjuvants in agro‐products.