Analyzing impurities in industrial acrylonitrile by gas chromatographic method
The impurities in acrylonitrile were qualitatively analyzed by using acid-modified polyethylene glycol(FFAP)capillary column with nitrogen as the carrier gas,and the cor-rected area normalization method was taken as the quantita-tion method.The results showed that according to the effective carbon number theory,acrylonitrile was suitable to replace propionitrile and cis-(or trans-)butenonitrile was suitable to replace methacrylonitrile.The recovery of impurities in acry-lonitrile was 90.1％-106.8％,the relative standard deviation(RSD)was 0.8％-7.5％,and the limit of detection was less than 6.6 μg/g.Both corrected area normalization method and internal standard method were applicated to quantitate the im-purities in acrylonitrile products,the three measurement re-sults of the same component showed excellent repeatability,and there were no significant difference between the two cal-culation results.
acrylonitrilegas chromatographyeffective carbon number theorycorrected factorcorrected area nor-malization method
万方数据
维普
