|建立了固定污染源废气中丙烯腈的气袋采样-低温浓缩-气相色谱/质谱分析方法。结果表明，该法在丙烯腈质量浓度16.1~4 050 μg/m3范围内具有良好的线性，相关系数R2＞0.999，检出限为9.54 μg/m3，回收率、日内与日间精密度均符合质控要求，能够满足废气中丙烯腈分析的要求。
|关键词: 丙烯腈 气袋 低温浓缩 气相色谱/质谱法
|Determination of Acrylonitrile Emissions from Stationary Sources Using Cryogenic Pre concentration Followed by GC/MS
LI Jun，LI Haiyan，CAO Juncheng
Lianyungang Municipal Environmental Monitoring Center Station, Lianyungang，Jiangsu 222001, China
|This study established a method for the determination of acrylonitrile using cryogenic pre concentration followed by GC/MS.The results showed that acrylonitrile was in good linearity within 16.1~4 050 μg/m3, and the correlation coefficient was larger than 0.999. The detection limit was 9.54 μg/m3. Meanwhile, the average recovery, the with in day and inter day RSDs also met the requirements of quality control. The recoveries of spiked samples were between 86.9% and 105.3%,which were stable enough to realize extensive use.
|Key words: Acrylonitrile Air bag Cryogenic pre concentration GC/MS