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用气液色谱法测定热力学参数具有比经典法快速、简单、样品用量少、易推广等优点。从五十年代以来此法发展颇为迅速,进行了大量的研究工作,但均以气相服从理想气体定律为基础,并未考虑固定液流失量的影响。本文测定了烷烃与芳烃在正十七烷中不同温度下的比保留体积、分配系数以及无限稀释下的活度系数和亨利系数,研究了固定液流失量的准确计算和气相非理想性的校正,整理了一套较为准确的基础数据,提高了测试精度。仪器与试剂上海分析仪器厂生产的102G型气相色谱仪,经适当改装;热导池检测器。
The determination of thermodynamic parameters by gas-liquid chromatography has the advantages of being faster and simpler than the classical method, less amount of sample and easy to popularize. Since the 1950s, the law has developed quite rapidly and a great deal of research work has been done. However, the law is based on the gas-phase principle of ideal gas and does not consider the effect of fixed liquid loss. In this paper, the specific retention volume and partition coefficient of alkanes and aromatics at different temperatures in n-heptadecane and the activity coefficient and Henry’s coefficient under infinite dilution were measured. The exact calculation of fixed liquid loss and the correction of non-ideal gas phase , Finishing a set of more accurate basic data, improve the test accuracy. Instruments and reagents Shanghai Analytical Instrument Factory 102G-type gas chromatograph, after appropriate modification; thermal conductivity detector.