大气压固体分析探头离子源—串联质谱法测定生活饮用水中莠去津

刘斌; 赵慧琴; 杨辉; 王浩然

doi:10.13421/j.cnki.hjwsxzz.2019.03.016

大气压固体分析探头离子源—串联质谱法测定生活饮用水中莠去津

Determination of Atrazine in Drinking Water by Atmospheric Pressure Solids Analysis Probe-Tandem Mass Spectrometry ASAP-MS/MS

摘要

摘要:
目的建立生活饮用水中莠去津的大气压固体分析探头离子源-串联质谱测定方法。
方法水样用移液枪直接上样，通过大气压固体分析探头离子源离子化，在大气压化学电离正离子模式下以多反应监测模式（MRM）检测，子离子确证模式（PIC）定性。
结果莠去津线性范围为（0.6~50.0）μg/L，相关系数为0.999 6，检出限为0.2 μg/L，定量限为0.6 μg/L。低、中和高三浓度水平下，空白水样加标回收率在74.8%~84.4%之间，相对标准偏差在9.7%~14.9%之间。
结论该方法前处理简单、分析速度快、灵敏度高，适用于生活饮用水中莠去津的快速筛查测定。

Abstract:
Objectives To develop a method on the determination of atrazine in drinking water by Atmospheric Pressure Solids Analysis Probe-Tandem Mass Spectrometry (ASAP-MS/MS).
Methods Water samples were added to the probe by pipette, ionized by atmospheric pressure solids analysis probe, detected by Multiple Reaction Monitoring (MRM) under positive mode of atmospheric chemical ionization, and qualified by Product Ion Confirmation (PIC).
Results The linear range of atrazine was (0.6~50.0) μg/L, the correlation coefficient was 0.999 6, and the limit of determination and quantitation were 0.2 μg/L and 0.6 μg/L, respectively. At low, middle, and high concentration levels, the recovery of standard addition for blank drinking water samples were 74.8%~84.4%, with a relative standard deviation of 9.7%~14.9%.
Conclusions This method has simple pretreatment, fast analysis speed, and high sensitivity, which is suitable for the rapid screening determination of atrazine in drinking water.

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