基于阳离子型金属有机骨架混合基质膜的分散固相萃取-超高效液相色谱-串联质谱法测定水中7种苯氧羧酸类除草剂

纪雪峰, 李爽, 吴阁格, 赵琳, 马继平

Determination of seven phenoxy acid herbicides in water by dispersive solid phase extraction-ultra performance liquid chromatography-tandem mass spectrometry based on cationic metal-organic framework mixed matrix membrane

JI Xuefeng, LI Shuang, WU Gege, ZHAO Lin, MA Jiping

表1 7种苯氧羧酸类除草剂的质谱参数

Table 1 MS parameters of the seven phenoxy acid herbicides

Analyte tR/min Precursor ions (m/z) Product ions (m/z) Declustering potentials/V Collision energies/eV 4-Chlorophenoxyacetic acid (4-CPA) 3.48 184.7*, 186.7 126.8, 128.9 -50, -49 -20, -20 4-Phenoxybutyric acid (PB) 3.83 178.8* 93.0 -54 -24 2,4-Dichlorophenoxyacetic acid (2,4-D) 4.17 219.0*, 221.0 161.0, 163.0 -40, -40 -19, -19 2-Methyl-4-chlorophenoxyacetic acid (MCPA) 4.29 199.0*, 201.0 141.0, 143.0 -50, -50 -22, -22 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) 4.94 252.7*, 254.9 194.8, 196.7 -45, -44 -20, -22 2,4-Dichlorophenoxybutyric acid (2,4-DB) 5.93 247.0*, 249.0 161.0, 163.0 -40, -40 -18, -21 2-(2,4,5-Trichlorophenoxy)propanoic acid (2,4,5-TP) 6.09 266.8, 268.7* 195.0, 196.9 -48, -45 -16, -25