摘要
建立了气相色谱-脉冲放电氦离子化检测器（GC-PDHID ）测定乙烯、丙烯样品中痕量一氧化碳和氢气的方法。对色谱柱、柱温、进样方式等条件进行了优化。采用外标法定量，在一氧化碳和氢气浓度分别为12μL/m3～390μL/m3和52μL/m3～800μL/m3的范围内时，标准曲线R2均大于0.99，一氧化碳和氢气检出限分别为7.6μL/m3和8.6μL/m3。实验结果表明，样品加标回收率在94.74％～110.2％之间，相对标准偏差为0.32％～2.83％，样品分析周期为15min。该方法分离效果好，具有良好的重复性和准确度，检出限低。本方法适用于乙烯、丙烯中痕量一氧化碳和氢气的检测。
A method for determination of trace carbon monoxide and hydrogen in both ethylene and propylene was established by GC-PDHID. The analysis conditions including column ,column temperature and injection mode were optimized. With the external standard method for quantitation ,good linear rela-tionships （ R2 ＆gt;0. 99 ） w hich ranged from 12 μL/m3 to 390μL/m3 （CO ）and 52μL/m3 to 800μL/m3 （H2 ） were obtained and the detection limits were 7.6μL/m3 （CO） and 8.6μL/m3 （H2 ） ,respectively .The experi-mental results showed that the recoveries of trace carbon monoxide and hydrogen in ethylene and propylene were between 94.74% and 110.2% ,the RSDs were between 0.32% and 2.83% ,and the separation was completed within 15min.The method is simple ,rapid ,which is sensitive and suitable for determination of trace carbon monoxide and hydrogen in ethylene and propylene.
出处
《分析仪器》
CAS
2014年第4期52-55,共4页
Analytical Instrumentation
