Molar mass measurement device utilizing freezing point depression method

凝固点降低法摩尔质量测量装置

Abstract

A molar mass measurement device utilizing a freezing point depression method comprises a stirring rod and a sample tube. The sample tube is a test tube with double layers of jackets, a cryogenic liquid inlet and a cryogenic liquid outlet are reserved on an interlayer, the cryogenic liquid inlet and the cryogenic liquid outlet are connected with an inlet and an outlet of a cryogenic liquid container, and the stirring rod is mechanically controlled to automatically vertically stir at a constant speed. The molar mass measurement device utilizing the freezing point depression method has the improvement that a circulating unit utilizing bath lotion in the cryogenic liquid container to refrigerate is additionally arranged, and an external refrigerating device with temperature controllable is utilized to feed circulating cryogenic liquid to the interlayer of the sample tube so as to realize temperature adjustment in an ice groove. Temperature of the circulating cryogenic liquid can be set according to needs, the limit that an original molar mass measurement device can only measure sample freezing point higher than zero DEG C is avoided, and temperature range of the sample freezing point is widened.
一种凝固点降低法摩尔质量测量装置,包括搅拌棒、样品管;所述样品管是一带双层夹套的试管,夹层设有低温液体的进出端口;夹层进出口连接一冷却液容器的输出和输入口;搅拌棒由机械控制的自动匀速垂直搅拌方式。本实用新型的改进是:另设有冷却液容器浴液进行制冷的循环机组,通过温度可控的外接制冷装置,向样品管夹层送入循环冷液以达到冰槽中的温度调节。本装置可根据需要设置循环液温度,避免了原装置只能测量样品凝固点高于0度的局限性,拓扩所测样品凝固点温度范围。

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    RU-2554621-C2June 27, 2015Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кемеровский технологический институт пищевой промышленности"Способ определения температуры начала льдообразования при замораживании водных растворов и влагосодержащих продуктов и материалов и устройство для его осуществления