检测工作场所空气中异佛尔酮的溶剂解吸气相色谱法的改进

发布时间：2018-05-05 02:06

本文选题：异佛尔酮 + 工作场所空气　；参考：《环境与职业医学》2015年02期

【摘要】：[目的]使用混合溶剂提高空气中异佛尔酮的溶剂解吸气相色谱测定法中的解吸效率。[方法]活性炭管采样后,10%(体积分数)异丙醇-二硫化碳混合溶剂解吸,聚乙二醇石英弹性毛细管柱INNOWAX(30.0 m×0.53 mm×1.0μm)分离,火焰离子化检测器检测,保留时间定性、标准曲线外标法定量。[结果]10%异丙醇-二硫化碳混合溶剂解吸活性炭中异佛尔酮,平均解吸效率为92.6%。浓度分别为10、60、150 mg/L的异佛尔酮加标样品测定结果显示批内、批间相对标准偏差分别5%、10%。异佛尔酮在0.28~400 mg/L呈线性关系,回归方程y^=1.947x-0.904,相关系数r=1.000 0;方法检出限为0.084 mg/L。以2.5 L采样量计算,异佛尔酮的最低检出浓度为0.034 mg/m3,最低定量浓度为0.11 mg/m3。[结论]采用10%异丙醇-二硫化碳混合溶剂为解吸剂,其解吸效率高于仅使用二硫化碳(70%)。该方法应用于工作场所空气中异佛尔酮的测定,方法精密度、准确度良好,解吸效率满足相关国家标准要求。
[Abstract]:[objective] to improve the desorption efficiency of isophorone in air by solvent desorption gas chromatography with mixed solvent. [methods] after the activated carbon tube was sampled, the mixture solvent of isopropanol and carbon disulfide was desorbed, the INNOWAX(30.0 m 脳 0.53 mm 脳 1.0 渭 m capillary column of polyethylene glycol quartz was separated, the flame ionization detector was detected, and the retention time was qualitative. Standard curve external standard method. [results] the average desorption efficiency of isophorone in activated carbon with 10% isopropanol and carbon disulfide was 92.6%. The results of determination of isophorone plus standard samples with concentration of 10 ~ 60150 mg/L showed that the relative standard deviations between batches were 5 ~ 10 ~ 10 respectively. Isophorone showed a linear relationship at 0.084 mg/L, the regression equation was y = 1.947x-0.904, and the correlation coefficient was 1.0000.The detection limit of the method was 0.084 mg / L. The lowest detectable concentration of isophorone is 0.034 mg / m ~ (3) and the lowest quantitative concentration is 0.11 mg / m ~ (3). [conclusion] the desorption efficiency of 10% isopropanol-carbon disulfide mixed solvent is higher than that of carbon disulfide alone. The method has been applied to the determination of isophorone in workplace air. The method is accurate and accurate. The desorption efficiency meets the requirements of relevant national standards.
【作者单位】：上海市疾病预防控制中心卫生检测室;
【分类号】：R134.4

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