顶空-固相微萃取法测定地表水中四乙基铅

Analysis of Tetraethyl Lead in Surface Water with Head Space Solid Phase Microextraction

建立了满足地表水中四乙基铅限值要求的＂顶空-固相微萃取-气质联用法＂。分析结果表明：采用空调及水浴控温使萃取温度恒定在23.0~24.5℃范围内,结合内标法进行定量分析,标准曲线线性关系良好（r=0.9995）,检出限（3.143SD）为0.085μg/L;河流及水库水水样的加标回收率为93.2%~128%,加标样品平行的相对偏差为5%~12%。

GC/MS method with head space solid phase microextraction（HS-SPME） for analysis of tetraethyl lead in surface water was established.Extraction was doing in water under air-condition in order to improve the precision of HS-SPME method,and the temperature changed in rang of 23.0~24.5 ℃.Internal standard quantitative method was used to improve the precision of HS-SPME method,too.Results showed that the correlation coefficient and detection limit（3.143SD） were 0.9995 μg/L and 0.085 μg/L,respectively.Recoveries and relative deviations of spiked surface waters were in range of 93.2%~128% and 5%~12%,respectively.