【摘要】 研究了固相微萃取 气相色谱 质谱联用测定水中扑草净的方法,采用聚丙烯酸酯(PA)萃取头,对影响固相微萃取萃取效率的萃取时间、搅拌速度、pH值以及盐度等进行了优化。在优化实验条件下,方法线性范围在0 1ng/mL～1000ng/mL之间,检出限为1.5ng/L。用该法分析了合成井水、自来水和湖水样品,回收率在85.4%～89.1%之间,相对标准偏差在1.8%～5.2%之间。本方法适合于水中痕量扑草净的分析。更多还原

【Abstract】 <Abstrcat>A method for determination of prometryne in water was developed by solid phase microextration(SPME) coupled with gas chromatographymass spectrometry(GCMS). A polar polyacrylate coated fiber was used. The experimental conditions, such as extraction time,stirring speed, pH, salt concentration, were optimized. Under the optimum conditions, the linear range was from 0.1 and 1000 ng/mL with detection limit of 1.5 ng/L and relative standard deviation of 5.3%. The method was used for determination of trace prometryne in the synthesized well water, tap water and lake water samples. The recovery was from 85.4% to 891% and RSD was from 1.8% to 5.2%.更多还原