水中14种氨基甲酸酯类农药残留测定

Simultaneous Determination of Fourteen Carbamate Insecticides Residues in Water

建立了固相萃取（sPE）-超高效液相色谱／三重四极杆串联质谱（uPLc—MS／MS）同时测定水中14种氨基甲酸酯类杀虫剂残留的方法。过滤后的样品经C18固相萃取柱富集净化后，采用BEHC18柱，以水（0．1％甲酸）-甲醇作为流动相进行梯度洗脱，采用串联质谱作为检测器进行检测。14种氨基甲酸酯类杀虫剂在相关线性范围内线性良好（r=O．9978～0．9999），回收率为70．8％-119％，相对标准偏差为2．2％～14．3％，检出限为0．1～2．5ng／L。本方法快速，灵敏度高，适用于测定水体中14种氨基甲酸酯类杀虫剂的残留。

A method for analysis 14 carbamate insecticides residues in water was developed using solid phase extraction （SPE） and ultra- performance liquid chromatography tandem mass spectrometry （UPLC -MS/MS）. The water samples were extracted and cleaned by SPE through CIS column, and then the BEH Cl8 column was used for the separation, with a linear gradient elution program of methanol - 0. 1% formic acid in water as the mobile phase. Multiple reaction monitoring （MRM） was used for the selective detection of 14 carbamate insecticides. There were good linear relations （ r = 0. 9978 - 0. 9999 ） of all the 14 carbamate insecticides during their separate linear range. The recoveries ranged from 70.8% to 119% , with the relative standard deviations of 2.2% -14.3%. The detection limit was between 0. 1 - 2.5 ng/L.