本文报道了一种在恒温状态下测定药物溶液冰点的方法。此法与现有的冰点测定方法如步冷曲线法和差示扫描量热法相比,除具有简便快速及测定准确的优点外,还具有可用于测定高分子化合物溶液冰点的濳在优点。以NaCl溶液为例,用文献报道的冰点值和步冷曲线法和差示扫描量热法测定的冰点值为对照,验证了本空气湿度冰点测定法。 This article reports a method of determining the freezing point of a drug solution at a constant temperature. Compared with the existing freezing point determination methods such as the step-cooling curve method and the differential scanning calorimetry method, this method not only has the advantages of simple and rapid determination and accurate determination, but also has the advantage of being able to determine the freezing point of the polymer compound solution. The NaCl solution was used as an example to verify the freezing point of air humidity by comparing the freezing point values ​​reported in the literature with those of the step-cooling curve method and differential scanning calorimetry.