Method for detecting trace impurities in caprolactam

The invention relates to a method for detecting trace impurities in caprolactam. The method comprises the following steps: S1, adding an extraction agent into caprolactam, and stirring to completely dissolve the extraction agent and caprolactam, S2, adding deionized water to completely separate the extraction agent out of caprolactam, and S3, taking out the extraction agent, and carrying out gas chromatographic analysis. According to the detection method disclosed by the invention, a large number of types of microscopic impurities in caprolactam can be rapidly and effectively detected throughsimple operation, and the reproducibility is good. 本公开涉及一种己内酰胺中微量杂质的检测方法。该方法包括：S1：向己内酰胺中加入萃取剂并搅拌，使萃取剂与己内酰胺完全溶解，S2：加入去离子水，使萃取剂完全从己内酰胺中析出，S3：取出萃取剂然后进行气相色谱分析。根据本公开的检测方法，可以通过简单的操作而快速有效地检测出己内酰胺中的大量种类的微观杂质，而且重现性好。