基于二硫化碳解吸前处理技术GC-FID测定工作场所空气中烷烃

发布时间：2018-06-02 14:05

本文选题：烷烃 + 二硫化碳解吸　；参考：《现代化工》2017年07期

【摘要】：为建立工作场所空气中正戊烷、正己烷、正庚烷3种烷烃有毒物质的溶剂解吸-气相色谱检测法,采用二硫化碳解吸脱附作为前处理手段,利用TG-5MS毛细管柱对目标物质进行分离,以氢火焰离子化检测器进行检测,保留时间定性,峰面积响应值定量,外标法计算。结果表明:该方法能够很好地分离并检测定量出正戊烷、正己烷、正庚烷各自含量,各自标准曲线相关系数均达到0.999 0,精密度在1.83%~5.79%范围内,实际样品加标回收率在89.6%~97.8%之间,该方法检出限:正戊烷为0.008 6μg/m L,正己烷为0.200 0μg/m L,正庚烷为0.056 6μg/m L。
[Abstract]:In order to establish a solvent desorption-gas chromatographic method for the determination of n-pentane, n-hexane and n-heptane in workplace air, carbon disulfide desorption and desorption was used as a pretreatment method. The target material was separated by TG-5MS capillary column, detected by hydrogen flame ionization detector, the retention time was qualitatively determined, the response value of peak area was quantified, and the external standard method was calculated. The results show that this method can be used to separate and detect the contents of n-pentane, n-hexane and n-heptane. The correlation coefficient of standard curve is 0.999, the precision is 1.83%, and the recovery rate is between 89.6% and 97.8%. The detection limits for n-pentane, hexane and heptane are 0.008 渭 g / mL, 0.200 渭 g / mL and 0.056 6 渭 g / mL, respectively.
【作者单位】：江苏华创检测技术服务有限公司;中国石油大学(华东);
【分类号】：O657.71;R134.4

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