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The method study on emergency detection of aromatic compounds and chlorides based on portable GC-MS

机译：基于便携式GC-MS的芳族化合物和氯化物应急检测方法研究

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In order to quickly identify the kinds of volatile organic compounds(VOCs) and quantified their concentrations, a method based on portable GC-MS was developed, which was especially suitable for the detection of aromatic compounds and chlorides. The mixed gases were directly collected by solid phase microextraction head for 120 seconds. After that, they were analyzed on the portable GC-MS, identified by retention time and MS peaks, quantified by external standard method. It only took 6.4 min from sampling to get the result. The linear correlation was larger than 0.98, and the minimum detectable concentration was lower than half of their occupational exposure limits, respectively. In the simulation test, the relative error was lower-than 4.4%. This method can directly collect the air sample in the field, rarely depends on external conditions, and is very convenient to carry out. It takes very short time to complete the detection, at the same time it can identify and quantify multiple kinds of gases at a time. So this method is quite suitable for the emergency detection at the gas leak site.
机译：为了快速识别种挥发性有机化合物（VOC）的定量和它们的浓度，基于便携式GC-MS的方法被开发，这是特别适合于检测的芳族化合物和氯化物。混合气体直接通过固相微萃取头120秒收集。之后，他们进行了分析在便携式GC-MS，通过保留时间和质谱峰鉴定，通过外标法进行定量。只用了6.4分钟，从取样到得出结果。线性相关性大于0.98时，和最小检测浓度分别比其职业暴露限制一半以下，。在模拟试验中，相对误差为低于4.4％。该方法可以直接收集在该领域的空气样品，很少依赖于外部条件，并且是进行非常方便。这需要很短的时间内完成检测，同时它可以同时识别和量化多种类型的气体。因此，这种方法非常适合在煤气泄漏现场应急检测。

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