空气中苯的溶剂解吸气相色谱法影响因素分析

Analysis of Influencing Factors of Solvent Desorption Gas Chromatography of Benzene in Air

目的:探讨气相色谱法测定空气中苯的影响因素,分析可能存在的误差来源。方法:根据GB50325中要求进行采样和分析。结果:试样中苯浓度为1.5μg/m L对苯的稳定性影响显著,其他试样的批内、批间变异分析不显著。结论:低浓度苯在二硫化碳介质中存在不稳定性因素,随放置时间的延长苯有变异的趋势。

Objective:To study the influence factors of benzene in air by gas chromatography,analysis of possible sources of error.Method:Sampling and analysis are required in accordance with GB50325.Result:The concentration of benzene in the sample is1.5g/mL,which has remarkable influence on the stability of benzene.There were no significant differences between the batch and batch analysis of other samples.Conclusion:Unstable factors exist in low concentration benzene in carbon disulfide medium.With the extension of time,benzene has a trend of variation.