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本文将乙烯产品中微量的CO、CO_2测定方法中的预切条件进行了改正,即将双柱预切改为单柱预切,并对色谱操作条件进行了优化。改正后的方法操作简单、基线稳定、无阀切换信号的干扰,且准确性高、重复性好,在工业分析上有很大的应用价值。
In this paper, the precut conditions in the determination of trace amounts of CO and CO_2 in ethylene products were corrected, that is, the double column pre-cut was changed to single-column pre-cut, and the chromatographic operating conditions were optimized. The corrected method has the advantages of simple operation, stable baseline, no valve switching signal interference, high accuracy, good repeatability and great application value in industrial analysis.