化学
色谱法
质谱法
离子迁移光谱法
飞行时间质谱
四极
离子
农药残留
分析化学(期刊)
超临界流体色谱法
四极飞行时间
超临界流体
检出限
杀虫剂
气相色谱法
串联质谱法
电离
物理
有机化学
原子物理学
生物
农学
作者
Shen Ying,Huang-Fei Jin,Xinran Ma,Jun Cao
标识
DOI:10.1016/j.foodres.2023.113769
摘要
This experiment aimed to establish a green, simple and highly sensitive method (supercritical fluid chromatography (SFC) coupled with ion mobility quadrupole time-of-flight mass spectrometry (IM-Q-TOF/MS)) for the detection of multiple pesticides in foods. During the experiments, several important SFC parameters, such as stationary phase, modifier, make-up solution, back-temperature and back-pressure were optimized. Here, single-field collision cross section (CCS) values and multifield CCS values of 20 pesticides were examined by IM-Q-TOF/MS as highly specific parameters with excellent experimental precision. In addition, based on accurate mass matching and fragment ion comparison, mass fragments were obtained by IM-Q-TOF/MS, which elucidated the regularities of compound structure and characteristic fragment ions. Under the optimized conditions, satisfactory linearity (R2 ≥ 0.9989) and recoveries (79.60% to 112.97%) were obtained. The intra- and interday precisions were favorable, with RSDs lower than 4.91 and 7.65%, respectively. Additionally, the method showed low limits of detection (0.1-8.8 ng/mL). The proposed method has been successfully applied to the highly sensitive detection of phenylurea herbicide, triazine herbicides, organophosphorus pesticide, pyrethroid insecticide and acaricide in yam and potato.
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