工业丙烯腈中噁唑及其它有机杂质的气相色谱分析

提出了一种用毛细管气相色谱分析工业丙烯腈中微量噁唑及其它杂质的方法。用气相色谱．质谱法对丙烯腈中的噁唑及其它杂质进行了定性，并用化学法验证了噁唑的定性结果。采用有效碳数法计算出噁唑的质量相对校正因子为2．396，内标法测定了国内不同公司生产的丙烯腈中微量杂质的含量。其中噁唑的质量含量为0．001％-0．06％。方法已在某石化公司丙烯腈装置技术改造中应用于噁唑含量的控制分析。

Determination of Oxazole and Other Impurities in Acrylonitrile by Gas Chromatography

An approach for the determination of trace amount oxazole and other impurities in industrial acrylonitrile by a capillary gas chromatography is presented. The oxazole and other impurities in acrylonitrile were determined by the gas chromatography mass spectrometry. The determination of the oxazole in acrylonitrile was verified by the chemical method. The mass response of oxazole was calculated according to the effective carbon numbers method. The relative mass response of oxazole is 2.396. The internal standard method was utilized to the quantitative analysis of the impurities in acrylonitrile from different companies. The mass percent of oxazole is 0.001% to 0.06% in acrylonitrile from six companies. The method has been used to analyze the content of oxazole in acrylonitrile during the improvement of the unit for acrylonitrile production in a company.