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Precautions for using a ground glass instrument in the laboratory
1. Before assembling the instrument, the grinding joints should be cleaned and dried with detergent to prevent the grinding joints from being tightly connected, resulting in air leakage. When washing, avoid using solid friction powder such as decontamination powder to avoid damage to the grinding.
2. When assembling the instrument, the parts should be clamped separately, arranged neatly, and the angle and height should be adjusted properly before assembly, so as to avoid the unbalanced force at the joint of the grinding joint and break.
3. After the instrument is used, it should be cleaned and placed separately as soon as possible. Otherwise, it is easy to cause the joint of the grinding joint to be disassembled. For grinding instruments with pistons and plugs, the pistons and plugs cannot be exchanged at will, and should be stored on the pad.
4, the use of grinding equipment under normal pressure, generally do not apply lubricant, so as not to contaminate the reactants or products. However, when a strong base is present in the reaction, a lubricant should be applied to the ground to prevent the joint at the ground from being bonded by alkali corrosion.
5. When the glass ground joint is difficult to disassemble, use a wooden stick to gently tap the joint or tap the joint at the edge of the test table to loosen it.