1: When moving clean glass instruments, do not let your fingers touch the inner wall of the instrument. When holding a pipette, do not touch the tip of the pipette with your hands to the part that needs to be placed in the liquid.
2: The cleaned instruments should be placed on a rack or on clean gauze to dry. Do not wipe them with a rag, let alone wipe the inner wall of the instrument with a rag. After use, pipettes, stirrers, etc. should be placed on a rack or in a beaker with a clean gauze at the bottom. Do not place them randomly on the laboratory table. The laboratory table should be kept clean and tidy.
3: The measuring bottle is a measuring instrument, do not use it as a container.
4: The instrument stoppers with ground glass stoppers such as measuring bottles should not be covered incorrectly. When washing, the stoppers and the instrument itself should be placed together to avoid confusion. When not in use, separate the stopper and the bottle mouth with a paper strip. The ground glass stopper that has been wiped with vaseline should be washed with an organic solvent to remove the vaseline, and then separated with a paper strip.
5: Do not use filter paper to weigh drugs, and do not use filter paper for records.
6: Do not use paraffin to seal the bottle mouth of fine medicines to avoid mixing.
7: The size of the label paper should be commensurate with the container, and it should be affixed to the upper 2/3 of the reagent bottle or beaker, and the test tube should be affixed to the upper part. The name, specification and concentration of the substance, the date of preparation and the preparer should be written on the label.
8: After the standard reagent is dried, it should be placed in a weighing bottle in a desiccator. After weighing, put it back in the desiccator for standby use.
9: After taking the reagent and standard solution, the reagent bottle must be immediately sealed and put back to its original place. If the reagent and standard solution are not used up, do not pour them back into the bottle to avoid mixing. When taking the standard solution, a certain amount should be poured into a clean beaker as needed, and then measured from the beaker with a pipette. Do not use a pipette to measure directly from the reagent bottle.
10: All experiments involving smoke, toxic gases and odorous gases should be carried out in a fume hood. The cabinet door should be closed and cannot be opened unless necessary.