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目的:建立高效液相色谱-串联质谱法同时测定生活饮用水中2,4-滴和灭草松的方法。方法:水样经0.22μm的滤膜过滤,直接进高效液相色谱仪梯度分离,经电喷雾负离子方式离子化后质谱以多反应监测模式(MRM)测定。结果:灭草松和2,4-滴在1~200μg/L范围内线性良好,相关系数r均优于0.999。灭草松和2,4-滴的检出限为0.1μg/L和0.2μg/L,在加标浓度分别为1、10和100μg/L时回收率为90%~116%,相对标准偏差为2.2%~5.8%。结论:建立的方法可直接应用于生活饮用水中灭草松和2,4-滴的测定,方便快捷。
Objective: To establish a method for simultaneous determination of 2,4-D and meso-pinene in drinking water by high performance liquid chromatography-tandem mass spectrometry. Methods: The water samples were filtered through 0.22μm membrane and directly separated by gradient elution with high performance liquid chromatography. The mass spectra were determined by multiple reaction monitoring (MRM) after electrospray ionization. Results: The calibration curves of imazapyr and 2,4-D were linear in the range of 1 ~ 200 μg / L with the correlation coefficients r over 0.999. The detection limits of imazamox and 2,4-D were 0.1μg / L and 0.2μg / L, respectively, and the recoveries were 90% ~ 116% at the spiked concentrations of 1, 10 and 100μg / L respectively. The relative standard deviations 2.2% ~ 5.8%. Conclusion: The established method can be directly applied to the determination of imazapyr and 2,4-D in drinking water, which is convenient and quick.