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采用自行设计、安装、调试的一套低温下测定汽液平衡数据的装置，建立了一种取样分析方法，测定了Ｒ２２－Ｒ１４２ｂ二元系在６５．８６～６２１．１２ｋＰａ压力范围内八个温度点的汽液平衡数据。所测数据通过了热力学一致性校验，并用ＲＫＳ状态方程和ＮＲＴＬ活度系数方程进行了关联，取得了满意结果。
A set of sampling and analyzing method was established by using a set of device designed, installed and debugged to measure the vapor-liquid equilibrium data at low temperature. The temperature of the two systems of R22-R142b binary system was measured at eight temperatures of 65.86 ~ 621.12kPa Point vapor-liquid equilibrium data. The measured data passed the thermodynamic consistency check, and the RKS equation of state and NRTL activity coefficient equation were correlated, and satisfactory results were obtained.