|关键词: 超高效液相色谱-质谱法 草甘膦 丁基黄原酸 基质效应 直接进样
|Determination of Glyphosate and Butylxanthic Acid in Water by Ultra high Performance Liquid Chromatography Tandem Mass Spectrometry with Direct Injection
CHEN Jie jiang，LI Feng cai，GAO Yi bin，LI Bing，XU Long
Suzhou Industrial Park Environmental Monitoring Station, Suzhou, Jiangsu 215027, China
|A method for the determination of glyphosate and butylxanthic acid in surface water and tap water by direct injection ultra high performance liquid chromatography tandem mass spectrometry was established by optimizing chromatographic conditions, diluting samples and adding ammonia. The linear relationship of glyphosate and butylxanthic acid was good in the respective linear range, and the correlation coefficient (R2)>0.999. The detection limits were 5.20 (sample was diluted 20 times in pretreatment) and 0.08 μg/L respectively, which were far below the national standard limit. The recoveries of glyphosate and butylxanthic acid were 73.8%~92.3% and 85.0%~113.0% respectively. The standard deviations of parallel determinations were less than 10%. The accuracy and precision met the requirements of quality control. The method simplifies the sample pretreatment procedure and successfully reduces the interference of matrix effect on the determination of glyphosate and butylxanthic acid.
|Key words: Ultra high performance liquid chromatography tandem mass spectrometry Glyphosate Butylxanthic acid Matrix effect Direct injection