用沸点升高法来测定溶液中溶质的分子量,所用的仪器有几种。以前我校所用的是柯曲尔氏(Cottrell)仪器。这套仪器主要的缺点,是虽经过长时间加热后,温度计上温度仍升降不定,不能得一个固定的温度。因之便不能求得正确的分子量;并且构造较为复杂,制造比较麻烦,又容易损坏;同时容量太小,浪费药品。针对这些缺点,于是设计另一套仪器。其装置如图所示。仪器本身是一个 The boiling point elevation method is used to determine the molecular weight of the solute in solution. There are several instruments used. In the past, our school used the Coltrell instrument. The main drawback of this instrument is that although the temperature on the thermometer still rises and falls after a long period of heating, a fixed temperature cannot be obtained. Because of this, it is impossible to obtain the correct molecular weight; and the construction is more complicated, the production is more troublesome, and it is easily damaged; at the same time, the capacity is too small and the medicine is wasted. To address these shortcomings, we designed another set of instruments. The device is shown in the picture. The instrument itself is a