溶剂解吸-气相色谱法测定工作场所空气中氯乙烯

发布时间：2018-01-24 01:24

本文关键词： 工作场所氯乙烯溶剂解吸气相色谱法　出处：《中国职业医学》2015年04期 　论文类型：期刊论文

【摘要】：目的建立工作场所空气中氯乙烯的溶剂解吸-气相色谱测定方法。方法以活性炭管采集空气样品,采用二硫化碳溶液解吸后,经DB-624弹性石英毛细管色谱柱分离,采用气相色谱仪进行检测。结果氯乙烯质量浓度在8.00~800.00 mg/L呈线性关系,相关系数为0.999 9,最低定量浓度和最低检出浓度分别为0.15和0.05 mg/m3(采集3.00 L空气计);平均解吸效率为95.00%~95.50%,批内、批间精密度分别为2.98%~5.00%和3.40%~5.33%。平均采样效率为95.20%~95.80%;100 mg活性炭管吸附剂对氯乙烯穿透容量为0.87 mg;空气样品在常温下至少可以保存7 d。结论本方法解吸效率和灵敏度高,精密度好,样品保存时间长,操作方法简便,适用于工作场所空气中氯乙烯的采样与测定。
[Abstract]:Objective to establish a method for the determination of vinyl chloride in workplace air by solvent desorption and gas chromatography. It was separated by DB-624 elastic quartz capillary column and detected by gas chromatograph. Results the concentration of vinyl chloride was linear in the range of 8.00 ~ 800.00 mg/L. The correlation coefficient was 0.999 9, the lowest quantitative concentration and the lowest detectable concentration were 0.15 and 0.05 mg / m ~ (3), respectively. The average desorption efficiency was 95.00% and 95.50% in batches. The precision between batches was 2.98% and 5.33%, respectively. The average sampling efficiency was 95.20% and 95.80%, respectively. The penetration capacity of 100 mg activated carbon tube adsorbent to vinyl chloride was 0.87 mg. Conclusion the desorption efficiency and sensitivity of the method are high, the precision is good, the sample preservation time is long, and the operation method is simple. Suitable for sampling and determination of vinyl chloride in workplace air.
【作者单位】：广东省职业病防治院广东省职业病防治重点实验室;
【基金】：广东省职业病防治重点实验室(2012A061400007) 广东省化学中毒与核辐射突发事件医学救援应急技术研究中心(2012A032100002) 广东省医学科研基金立项课题(B2013027)
【分类号】：R134.4;O657.71
【正文快照】： 氯乙烯即乙烯基氯,属于卤代烃,是应用在高分子化工的重要单体,工业上大量用作生产聚氯乙烯的单体[1-2]。工作场所空气中氯乙烯的标准测定方法,目前在国内为直接进样-气相色谱法和热解吸-气相色谱法[3]。直接进样是选用注射器或者气袋进行瞬时采样,只能反映工作场所空气中氯乙

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