正己烷干扰苯检测管检测苯的特异性

朱晓玲; 王雪毓; 谢玉璇; 周伟

doi:10.16369/j.oher.issn.1007-1326.2019.04.017

正己烷干扰苯检测管检测苯的特异性

Effect of n-hexane on specificity of benzene detection tubes

摘要

摘要:
目的探讨正己烷气体对苯检测管特异性的影响，为苯检测管的选择和快速检测提供科学依据。
方法在30~200 mg/m³的范围内，通过动态配气仪分别设定4个不同质量浓度的苯或正己烷的气体环境，同时使用国家标准方法和检气管法进行检测，通过比较检测结果，评价苯检测管检测结果的准确度，并分析正己烷气体对苯检测管特异性的影响。
结果和国家标准方法所得检测结果相比，4种苯检测管相对误差范围为12.1%~41.1%。正己烷设定质量浓度为30 mg/m³时，2种苯检测管发生显色反应；在50 mg/m³、100 mg/m³和200 mg/m³ 3个设定的质量浓度进行检测时，3种苯检测管均发生显色反应，且随着正己烷设定质量浓度的增加，苯检测管检测到的质量浓度也随之增加。
结论使用苯检测管应注意正己烷对其检测结果的干扰作用。

Abstract:
Objective To discuss the effect of n-hexane on the specificity of benzene detection tubes, so as to provide scientific basis for the selection and rapid detection of benzene detection tubes.
Methods Airborne benzene or n-hexane gas with 4 different levels, concentration ranged with 30-200 mg/m³, were made in dynamic distribution meter. National standard method and gas detector method were used to test the samples and the accuracy of benzene gas detection tube was evaluated, and the effect of n-hexane gas on the specificity of benzene detection tube was evaluated.
Results Compared with the results measured by the national standard method, the relative deviations of four kinds of benzene detection tubes ranged from 12.1% to 41.1%. Two kinds of benzene detection tubes showed chromogenic reaction at 30 mg/m³ n-hexane. Three kinds of benzene detection tubes showed chromogenic reaction at 50, 100, and 200 mg/m³ n-hexane respectively, and the detection concentration of the benzene detection tubes increased with the increment of n-hexane concentration.
Conclusion N-hexane could interfere with the detection of benzene detection tubes, which should be paid attention to.

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