Rules for access to medicines in chemical laboratories

Rules for access to medicines in chemical laboratories

1. Storage of medicines: Generally, solid medicines are placed in a jar, liquid medicines are placed in a thin-mouth bottle (a small amount of liquid medicine can be placed in a drop bottle), and the gas is placed in a gas collection bottle and covered with a glass piece. Special such as sodium metal stored in kerosene, white phosphorus stored in water.
2. the general principle of drug use 1 dosage: according to the experimental needs to take medicine. If the dosage is not stated, the minimum amount should be taken. The solid should cover the bottom of the test tube. The liquid should be 1~2mL. The more taken reagents should not be returned to the original bottle, nor can they be littered. They should not be taken out of the laboratory and should be placed in another clean, designated container. 2 "Three no": any medicine can not be taken by hand, tongue taste, or directly with nasal smell reagent (if you want to smell the smell of gas, apply the hand to gently fan the mouth of the bottle, only a small amount of gas into the nostrils).

3. the use of solid drugs 1 powder and small granular drugs: use a spoon (not replaced with a V-shaped paper trough) 2 block and strip drugs: with tweezers.

4. the use of liquid medicine 1 liquid reagent pouring method: remove the bottle cap, pour it on the table (to avoid contamination of the drug). The label should be toward the palm of the hand (to prevent the residue from flowing down and corroding the label). Pick up the reagent bottle, close the mouth of the bottle to the edge of the test tube, tilt the test tube, slowly inject the reagent, pour it, cover the bottle, and label it outwards and put it back in place. 2 Drop method of liquid reagent: use of dropper: a, first squeeze the air in the dropper outside the liquid, then extend into the liquid to absorb the reagent b, drip the reagent, the drip tube should remain vertically above the mouth of the container Drop c, during use, always keep the rubber head on, can not be inverted or horizontal, so as not to be corroded by the reagent d, the dropper is used, immediately wash it with water (except for the dropper on the dropper) e, plastic head Do not extend into the container or contact the wall when using the dropper, otherwise it will easily cause the dropper to rupture.