苯系物相对质量校正因子的测定与比较分析

Determination and Comparative Analysis of Relative Mass Correction Factors for Benzene Series Compounds

为降低苯系物对实验人员健康的影响和对环境空气的污染,结合氢火焰离子化检测器等碳响应的特点,用同一台气相色谱仪,在相同条件下测得不同浓度苯系物相对质量校正因子的相对标准偏差不大于4.0%,测得不同时间苯系物相对质量校正因子的相对标准偏差不大于3.1%,与利用有效碳数估算的相对质量校正因子无显著差异.此外,使用相对质量校正因子法与外标法对标准样品进行测定,各组分测定结果相对误差不大于4.7%,由此得出相对质量校正因子法具有较高的正确度.因此,将利用试验测得的相对质量校正因子与外标法相结合进行苯系物定量,能够保证监测结果的质量,同时可减少苯系物标准物质的使用种类.

In order to reduce the impact of benzene derivatives on the health of laboratory personnel and the pollution of environmental air,combined with the characteristics of the isocarbon response of a hydrogen flame ionization detector,the relative standard deviation(RSD)of the relative mass correction factor of benzene series compounds with different concentrations was not more than 4.0%,and the RSD of the relative mass correction factors for benzene series compounds at different times was not more than 3.1%,when measured under the same gas chromatograph and under the same conditions.There was no significant differences with the relative mass correction factors estimated using effective carbon number.In addition,using the method of relative mass correction factor and the external standard for the determination of the standard samples,the relative error of the determination results of each component was not more than 4.7%,indicating that the method of relative mass correction factor has a high accuracy.Therefore,combining the relative mass correction factor measured by the test with the method of external standard to quantify the benzene series can ensure the quality of monitoring results and reduce the types of benzene series standard substances.