蒸气压渗透计(VPO)依其结构不同,分为探头下垂式蒸气室和探头站立式蒸气室两类。关于仪器常数K是否随溶质的分子量范围的不同而变化的问题,已引起人们的注意,但报道的结果并不一致。因仪器、标样及纯度、操作方法的不同,难以判断其误差。为了便于比较,本文选用VPO仪中具有代表性二类仪器,对同一标样进行了标定。 Depending on the structure of the vapor pressure osmometer (VPO), there are two types of vapor pressure osmometer (VPO): a probe steaming chamber and a probe steaming chamber. The issue of whether or not the instrument constant K varies depending on the molecular weight range of the solute has drawn much attention, but the results reported are not consistent. Due to equipment, standards and purity, different methods of operation, it is difficult to judge the error. In order to facilitate comparison, this paper selected VPO instrument representative of the second category, the same standard was calibrated.