Analyze several issues regarding experimental utensils
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Among the glass measuring tools, which ones can be heated and which ones cannot? Can those be put in the oven to dry? Can those gold and silver crucibles and HF still work? When drying test tubes with a hair dryer, why do you use hot air first and then cold air? Does it matter?
1. Glass measuring instruments cannot be heated directly by fire. The temperature cannot exceed 150 degrees when dried in an oven. Precision glass measuring instruments such as burettes, volumetric flasks, and pipettes generally do not need to be dried in an oven. 2. When drying the test tube with a hair dryer, use hot air first and then cold air to blow away the solvent vapor involved. This post was last edited by xwtsq on 2009-3-3 07:56 ]
Some glass measuring tools can be heated, such as graduated glass beakers, triangular flasks, etc. Although these are not very accurate, they should be considered a kind of measuring tool: lol
Strictly speaking, these glassware are not measuring tools. Commonly used glass measuring instruments in laboratories include burettes, pipettes (including single-marked pipettes and graduated pipettes), volumetric flasks, measuring cylinders and measuring cups, gas measuring tubes, etc.
1. Please download the Laboratory Analyst’s Reader from this website. 2. Please refer to Canghai moderator’s laboratory system collection post, which contains very detailed management. 3. After referring to the suggestions of the posters, form relevant rules and regulations for the use of glass instruments, which can regulate your analysts.