吹扫捕集气相色谱法测定水性涂料中的苯系物

摘要

An analytic method was developed for determination of 8 benzene derivatives in waterborne coating by use of purge and trap in GC. The conditions for chromatography and purge - selection were opti-mized. The linear - relation,relative standard deviation,detection limits and recovery were also investigated. The results showed that the given method provided good linear in the range between 2. 5~50. 0μg/L; The relative standard deviation (n =7) ranged from 1. 8% ~ 4. 3% ; The recovery rate was 88. 3 ~ 107% ; The detection limits was 0. 50 ~1.0μg/L.%建立了吹扫捕集气相色谱法测定水性涂料中8种苯系物的分析方法,对色谱条件、吹扫条件等进行了探讨,同时对分析参数如线性相关性、相对标准偏差、最低检出限及加标回收率进行了评价.结果表明:采用吹扫捕集气相色谱法,在2.5～ 50.0 μg/L范围内,8种苯系物的质量浓度和峰面积呈良好的线性关系；对加标浓度为5.0μg/L的涂料样品平行测定7次,其相对标准偏差为1.8％～4.3％；水性涂料样品的加标回收率在88.3％ ～ 107％之间；最低检出限在0.50～1.0 μg/L之间.