气相色谱-质谱法测定芳烃抽提环丁砜贫剂中烃含量

建立了采用气相色谱-质谱（GC/MS）分析芳烃抽提环丁砜贫剂中各烃组分结构和含量的方法。并使用三因素三水平正交试验来确定最佳色谱分离条件。对芳烃抽提环丁砜贫剂中各烃组分进行定性，对所得质谱谱图解析，并结合质谱标准谱库检索，与各烃组分标准样品保留时间对照，可确定各烃组分结构。以正辛烷为内标物，内标法定量，采用扫描方式分析环丁砜贫剂中各烃组分含量。配制标准溶液，测定各烃组分的相对体积校正因子。样品中各烃组分含量测定的相对标准偏差均小于5%，回收率在91%~109%之间，完成一个样品的分析时间约14 min。与传统的蒸馏法相比，该方法更精确、灵敏、快速、简便，且无环境污染。

Determination of the Hydrocarbon Content in Sulfolane Lean Agent of Aromatics Extraction by GC/MS

The hydrocarbon structure and content analysis in sulfolane lean agent of aromatics extraction were determined by gas chromatography-mass spectrometry (GC/MS). The orthogonal test of three factors and three levels was used to determine the best chromatographic conditions. According to the obtained mass spectrum analysis, combining with mass spectrometry standard library searching and the hydrocarbon components of standard sample retention time, the hydrocarbon component structure could be determined under the scan mode. Each hydrocarbon component content was determined using internal standard method with n-octane as internal standard substance under the scan mode. The standard solution was prepared， and the relative volume correction factors of the hydrocarbon components were determined. The relative standard deviaton of sample hydrocarbon content is less than 5%, the recovery rate is 91%—109%, and the analysis time is about 14 min. Compared with traditional distillation method, the method is more precise, sensitive, rapid, simple without environmental pollution.