吹扫捕集-GC/MS法测定水中苯系物质量控制指标研究  

Research of Quality Control Index for Aromatic Hydrocarbons in Water Determined by Purge and Trap-GC/MS

作　　者：胡冠九[1] 李娟[1] 袁力[1] 夏新[2] 王荟[1] 史啸勇[1] 

机构地区：[1]江苏省环境监测中心,江苏南京210036 [2]中国环境监测总站,北京100012

出　　处：《中国环境监测》2011年第B10期30-33,共4页Environmental Monitoring in China

基　　金：国家"水体污染控制与治理"重大科技专项(2009ZX07527-003)

摘　　要：采用吹扫捕集-气相色谱/质谱法,通过统计全国多家实验室的测定数据和实际样品测试两种方法,对水中苯、甲苯、乙苯、间/对二甲苯、邻二甲苯、苯乙烯和异丙苯8种苯系物的平行样测定相对偏差、空白加标回收率及实际样品加标回收率3个质控指标进行了研究,分别给出每种苯系物的质控指标评价标准,提出其平行样测定相对偏差为6.5%～13.2%;空白加标浓度为0.01～80μg/L时,空白加标回收率的范围为78%～87%;样品测定浓度为未检出～60μg/L、加标浓度在0.2～150μg/L时,实际样品加标回收率范围为74%～122%。Three quality control index of eight kinds of aromatic hydrocarbons,including relative bias of duplicates,recovery of blank spike and sample spike,were studied by sample test using purge and trap-gas chromatography-mass spectroscopy,and also by evaluating data collected from many labs national-widely.The quality control index were produced according to every target.The results showed that the maximum relative bias should be within 6.5%~13.2%;the blank recovery should be within 78%~87% when the spiking concentration was 0.01~80μg/L;The sample recovery should be within 74%~122% when the sample concentration was ND^60μg/L,and the spiking concentration was 0.2~150μg/L.

关 键 词：苯系物 质控指标 平行样相对偏差 空白回收率 样品回收率 

分 类 号：X830.2[环境科学与工程—环境工程] X84