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某些药品如维生素 B_2、谷氨酸等在测定比旋度时,温度对测定结果有较大影响,故测定时,必须将温度调节控制并稳定在规定温度范围内,或测出温度校正系数(或公式)加以校正。有些型号仪器如日本 OR-20型光磁直读式旋光计或连在紫外分光光度计上的旋光装置,在比色池室中均带有通入循环恒温水的调温装置,能够比较容易和较准确地调节恒温,但大多数旋光计都无调温装置,而一般实验室尚缺乏恒温设备,因此在测定时欲调节、控制一定的恒温,仍属困难。据了解,各地有几种简便办法,如采取将装好药液的旋光管侵入规定温度的水中一定时
Certain drugs such as vitamin B_2, glutamic acid, etc. in the determination of specific rotation, the temperature has a greater impact on the measurement results, so the determination must be controlled and stable temperature control within the specified temperature range, or measured temperature correction factor (Or formula) to be corrected. Some models such as Japan’s OR-20 type magneto-optical direct reading polarimeter or even connected to the UV spectrophotometer on the optical device in the colorimetric chamber with access to circulating thermostat water temperature control device can be relatively easy And more accurately adjust the thermostat, but most of the polarimeters have no thermostat device, but the general laboratory is still lack of thermostatic equipment, so to measure the time to regulate and control a certain constant temperature is still difficult. It is understood that there are several easy ways around, such as taking a liquid tube will be installed liquid into the water temperature of a certain time