1. The heating process is a common step in physical and chemical analysis. In actual work, some people often ignore or simply can’t figure out which instruments can be heated, and even make mistakes.
In fact, laboratory glassware are not directly heated, such as measuring cylinders, measuring cups, volumetric flasks, reagent bottles, etc. can not be directly heated. Reaction vessels such as beakers, Laboratory Flask, and flasks should be used as appropriate. If the basic knowledge is not known in the actual work, there will be errors and even inspection accidents.
2. When heating the laboratory glassware, glassware is not placed on the asbestos net, but the container is placed directly in the electric furnace, so that the container is unevenly heated or even bursts.
3. During use, the temperature changes too much, or the hot laboratory glassware that is quenched or removed at high temperature is placed directly on the table, and is not placed on the asbestos net as required, causing the container to rupture and the reagents to be lost, which may affect the normal operation of the inspection. .
4. In actual work, some people are afraid of trouble and are not accustomed to using the dryer properly. For the heating device that needs accurate weighing, it should be dried and taken out slightly cold (about 30s), put into a desiccator and cooled to room temperature for weighing (30min). You can).
When the warm appliance is placed in the dryer, leave a gap in the cover and wait a few minutes to cover it tightly; when moving the dryer, you should not only lower the lower part, but hold the cover to prevent the cover from slipping, causing no The necessary loss.
