According to the definition of physics and chemistry, the melting point of a substance refers to the temperature at which the substance changes from a solid state to a liquid state. In the field of organic chemistry, melting point determination is a basic method to identify the nature of a substance and one of the important methods for purity determination. Therefore, the melting point tester plays an important role in the chemical industry and medical research, and it is an essential instrument for the production of drugs, perfumes, dyes and other organic crystal substances.
The melting point tester uses the capillary specified in the Pharmacopoeia as the sample tube, and observes the melting process of the sample in the capillary through a high magnification magnifying glass clearly and intuitively. It is an ideal melting point detection instrument for pharmaceuticals, chemicals, dyes, perfumes, rubber, etc. Pay attention to the following related matters during use, which can effectively extend the service life of the instrument.
Precautions for use of melting point tester:
1. The melting point tester should be placed in a dry, dust-free and ventilated laboratory environment to prevent excessive humidity and dust pollution from reducing the service life of the melting point tester. The instrument should be far away from corrosive liquids such as acid and alkali;
2. During the capillary sampling process, take care to avoid breaking the capillary and hurt your hands. If the sample to be tested generates poisonous gas after decomposition, the instrument should be placed in a fume hood for testing. During the test, do not touch the heated part to avoid burns;
3. After the instrument is used, make sure that the temperature drops to room temperature. Before using the instrument, check whether the test tube sleeve is well assembled with the furnace body, and check whether the light source output is good.