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对异丙醇--环己烷双液系相图的实验条件作了改进.改进后得到的相图中与最低恒沸点相对应的最低恒沸温度和环己烷的体积百分比比改进前所得结果具有更高的精密度和更好的准确度 ,并用概率统计中的假设检验方法证明了改进后所得实验结果优于原条件下所得结果.“,”THE EXPERIMENT CONDITIONS ABOUT THE ISOPROPANOL CYCLOHEXENE DOUBLE LIQUID SYSTEM PHASE DIOGRAMS ARE MODIFICATED IN THIS PAPER.THE MINIMUM-BOILING AZEOTROPIC AND CYCLOHEXENE VOLUME FRACTION WHICH GOT FROM THE MODIFICATED PHASE DIOGRAMS ARE BOTH HIGHER FINENESS AND BETTER EXACTNESS.THAT THE EXPERIMENT RESULTS ARE BETTER THAN THE ORIGINAL IS PROVED BY THE USE OF HYPOTHESIS CHECK IN THE PROBABILITY STATISTICS.