溶剂解吸-气相色谱法同时测定工作场所空气中环己烷与甲基环己烷

发布时间：2018-03-23 05:19

本文选题：环己烷　切入点：甲基环己烷　出处：《中国职业医学》2016年02期 　论文类型：期刊论文

【摘要】：目的改进工作场所空气中环己烷与甲基环己烷的溶剂解吸-气相色谱测定方法。方法采用活性炭管采集样品,二硫化碳解吸,经DB-1毛细管色谱柱分离,火焰离子化检测器检测,标准曲线法定量。结果本方法环己烷与甲基环己烷的质量浓度分别在1.0~1 402.2与0.8~1 999.4 mg/L范围内呈线性关系,相关系数均为0.999 9;检出限均为0.3 mg/L,定量下限分别为1.0和0.8 mg/L,最低检出浓度均为0.2 mg/m3,最低定量浓度分别为0.7和0.6 mg/m3(以采集1.5 L工作场所空气计);平均解吸效率分别为98.5%~99.3%和97.6%~99.0%;批内相对标准偏差(RSD)分别为0.36%~0.59%与0.34%~0.50%,批间RSD分别为0.89%~2.04%与0.87%~2.22%;样品在室温下可保存7 d。结论本方法灵敏度高,精密度好,操作简单,可用于同时测定工作场所空气中环己烷与甲基环己烷。
[Abstract]:Objective to improve the method of solvent desorption and gas chromatographic determination of cyclohexane and methyl cyclohexane in workplace air. Methods the samples were collected by activated carbon tube, the carbon disulfide was desorbed, separated by DB-1 capillary column, and detected by flame ionization detector. Results the mass concentrations of cyclohexane and methyl cyclohexane were linear in the range of 1.0 ~ 1 402.2 and 0.810 ~ 1 999.4 mg/L, respectively. The correlation coefficient is 0.999, the detection limit is 0.999 mg / L, the lower limit of quantification is 1.0 and 0.8 mg / L, the lowest detectable concentration is 0.2mg / m3, the lowest quantitative concentration is 0.7,0.6 mg / m3, respectively, and the average desorption efficiency is respectively. The relative standard deviation (RSD) is 0.360.59% and 0.340.50. the RSD between the batches is 0.892.04% and 0.872.220.The samples can be preserved at room temperature for 7 days. Conclusion this method has high sensitivity, and the relative standard deviation (RSD) is 0.36% and 0.34%, respectively. It can be used for simultaneous determination of cyclohexane and methyl cyclohexane in workplace air.
【作者单位】：深圳市宝安区疾病预防控制中心;
【分类号】：R134.4;O657.71

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