气相色谱法快速检测乙烯中7种含氧化合物

Rapid determination of oxygenated compounds in ethylene by gas chromatography

建立了气相色谱-氢火焰离子化检测器（GC-FID）测定乙烯中7种微量含氧化合物的方法。对色谱柱柱温、载气流速和分流比等条件进行了优化;采用外标法定量,在一定浓度范围内,7种含氧化合物的标准曲线R2均大于0.99;加标回收率在91.4%～119.1%之间,相对标准偏差均小于5.0%。实验结果表明,7种含氧化合物的检出限在0.06 ～0.74 mL/m^3之间,样品分析周期为5 min。方法适用于乙烯中微量含氧化合物的快速检测。

A method was established for determining seven kinds of organic oxygenated compounds in ethylene byGC-FID . The analysis conditions including column temperature, gas flow and split ratio were optimized, under the optimal conditions, the calibration curves of these trace analytes were linear with correlation coefficients higher than 0. 99 and the detection limits were between 0. 06 mL/m^3 and 0. 74 mL/m^3. The experimental results showed that the recoveries of these compounds were between 91.4% and 119.1%, and the RSDs were better than 5.0%. The separation was completed within 5 min. The method is simple, rapid and sensitive, and suitable for rapid determination of trace organic oxygenated compounds in ethylene.