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到目前为止国内外在煤气的色谱分析中,几乎全部采用5A(或13X)分子筛作为固定相。其缺点是遇水则分离效率迅速下降,在常温下对CO_2和几乎所有的有机化合物产生永久性吸附而中毒。因此这种固定相在使用时其性能一直处于变化过程之中,给定量工作带来了很多困难。天津试剂二厂生产的碳多孔小球TDX已应用于某些气体分析中。和5A分子筛相比TDX具有柱效稳定、柱寿命长等优点,其性能不受水份、CO_2
Up to now, almost all of the gas chromatographic analysis at home and abroad adopts 5A (or 13X) molecular sieves as the stationary phase. The disadvantage is the rapid decline in the separation efficiency with water, at room temperature on CO_2 and almost all of the organic compounds have permanent adsorption and poisoning. Therefore, the performance of the stationary phase in use has been in the process of change, given the amount of work has brought a lot of difficulties. The Carbon Nanotube TDX from Tianjin Reagent Factory has been used in some gas analysis. Compared with 5A molecular sieve, TDX has the advantages of stable column efficiency and long column life, and its performance is not affected by moisture, CO 2