吹扫捕集-气相色谱-质谱法测定水中痕量丁基黄原酸  

Determination for Butylxanthic Acid in Water by Purge and Trap-Gas Chromatography-Mass Spectrometry

作　　者：王美飞[1] 胡恩宇[1] 杨丽莉[1] 

机构地区：[1]南京市环境监测中心站,江苏南京210013

出　　处：《中国环境监测》2011年第B10期12-14,共3页Environmental Monitoring in China

基　　金：国家"水体污染控制与治理"重大科技专项(2009ZX07527)

摘　　要：建立了吹扫捕集-气相色谱-质谱联用测定水中丁基黄原酸的方法。丁基黄原酸在酸性条件下分解成易挥发的二硫化碳,经吹扫捕集富集后用气相色谱分离质谱定量测定。与传统的分光光度法相比,更简便快捷,在0.25～10.0μg/L范围内线性良好,准确度高,添加回收率为98.3%～105%,精密度好,相对标准偏差为5.92%～10.7%,方法检出限为0.07μg/L。与顶空法相比,灵敏度更高。A method was established for determination of butylxanthic acid in water samples.Butylxanthic acid will become carbondisulfide with inorganic acid,and carbondisulfide is volatile.Then it was determined by purge and trap GC-MS.Comparing with the spectrophotometry,the present method is more convenient and organic solvent free.It shows good linearity when concentration ranged from 0.25μg/L to 10.0μg/L.The relative standard deviation（RSD） comes to be 5.92% to 10.7%,the average recoveries were from 98.3% to 105%,and the method determination limit was 0.07μg/L.The present method is more sensitive than the previous head-space-GC-MS.

关 键 词：丁基黄原酸 吹扫捕集 气相色谱-质谱联用法 

分 类 号：X830.2[环境科学与工程—环境工程]