论文部分内容阅读
萤光色层法是分析汽油族组成的标准方法,但该法费时较长,界面不易测准,误差较大,因此近年来国内外发展了将气相色谱法用于此分析。最初提出的是用过氯酸汞吸附烯烃,然后由烷烃、烯烃总和中扣除烷烃而求得烯烃,因而烯烃误差较大。后来用硫酸铜作烯烃吸附剂,低温吸附,高温解吸,可直接测出烯烃含量。但硫酸铜吸附剂制备过程复杂,而且以硅胶为载体,其不可逆吸附性难以克服,因此高碳数烃回收率较低。1986年陆婉珍、付文慧改用Chromosorb W为吸附剂担体取得了较好的结果。
Fluorescent chromatography is a standard method for analyzing the composition of gasoline families. However, this method takes a long time, the interface is not easy to be calibrated, and the error is relatively large. Therefore, in recent years, gas chromatography has been developed for this analysis both at home and abroad. Initially proposed is the use of mercury perchlorate adsorption of olefins, and then subtracted from alkanes, alkenes sum to get alkenes, and therefore greater error of olefins. Later, copper sulfate as an olefin adsorbent, low temperature adsorption, high temperature desorption, can be directly measured olefin content. But copper sulfate adsorbent preparation process is complex, and silica gel as the carrier, its irreversible adsorption difficult to overcome, so high carbon hydrocarbon recovery rate is low. 1986 Lu Wanzhen, Fu Wenhui switch to Chromosorb W adsorbent carrier achieved good results.