What are the three steps to be used in the laboratory to take solid drugs, and what are the precauti

Dispensing of solid medicines (stored in jars).

1) The use of lumpy drugs or metal particles (one horizontal, two down, three slow and vertical) instrument: tweezers.

Steps: First put the container horizontally, use tweezers to pick up the lumpy drug or metal particles and put them at the mouth of the container, and then slowly erect the container, so that the lumpy drugs or metal particles slowly slide along the container wall to the bottom of the container, so as not to break the container.

2) Powdered or small granular drugs (one oblique, two to three upright) instrument: medicine spoon or paper trough.

Steps: Tilt the test tube and carefully send the medicine to the bottom of the test tube with a medicine spoon (or paper tray), and then make the test tube stand upright so that all the drugs fall to the bottom to prevent the drug from sticking to the nozzle or the test tube.

Note: The spoon or forceps should be wiped clean with clean paper immediately after use.

When using solid drugs in the chemical laboratory, use a powder medicine spoon, use tweezers for blocks, use a graduated cylinder for a certain volume of liquid drugs, and grind a mortar for grinding solids.

Principles of drug use:

The source of the "three nos" (do not touch, do not smell, and do not taste) when using medicines: do not touch the products with your hands, do not put your nostrils to the mouth of the container to smell the smell of drugs (especially gases), and do not taste the smell of any medicines.

Pay attention to the principle of economy when taking drugs: the drugs should be taken in strict accordance with the dosage specified in the experiment. If the dosage is not stated, the liquid is generally dispensed in the smallest amount (1 2 ml), and the solid only needs to be covered with the bottom of the tube.

The maximum volume, liquids do not exceed 1 3 of the volume of the container, solids do not exceed 1 2.

Principle of disposal of leftover drugs: leftover drugs for experiments should not be used.

Save" and return the original reagent bottle, which will contaminate the unused drug product in the reagent bottle. Therefore, the leftover drugs can neither be put back into the original reagent bottle, nor can they be discarded at will, let alone taken out of the laboratory, and should be placed in the designated container.

Access to solid medicines:

Powder, granular drugs should be used medicine spoon or paper trough, steps: "one horizontal, two sending, three upright", that is, the test tube is placed horizontally, the medicine is sent to the bottom of the test tube with a medicine spoon or paper tray (as shown in the figure below), and then the test tube is upright, so that the drug slides into the bottom of the test tube.

When taking lumpy drugs or larger metal particles, tweezers should be used, and the steps: "one horizontal, two put, three slow vertical", that is, the test tube (or container) is first placed

Put the drug horizontally, after putting the drug at the mouth of the test tube (or container) (as shown in the figure below), then slowly erect the test tube (or container) so that the lumpy solid slowly slides to the bottom of the test tube to prevent breaking the bottom of the test tube (or container).

The steps for the dispensing of solid medicines are as follows:

1. Powder: medicine spoon and paper trough take the medicine with a medicine spoon, put the drug into the test tube or put the drug into the paper trough, put the paper trough into the test tube horizontally, and then put the test tube upright, and take out the paper trough after the drug enters the test tube.

2. Block: tweezers.

Take the test tube horizontally with the left hand of the medicine spoon, take the medicine with tweezers or the medicine spoon, place it at the mouth of the test tube, and then slowly stand the test tube upright, so that the medicine slowly slides down to the low end of the test tube.

Principles of drug use:

1. Do not touch the medicine with your hands, do not put your nostrils to the mouth of the container to smell the smell of drugs (especially gas), if you need to know the taste of the medicine, you can use your hands to gently fan it to smell the smell of the medicine. Do not taste any medicines.

2. Pay attention to saving medicines. The drug should be taken strictly according to the dosage specified in the experiment. If the dosage is not stated, the minimum amount should generally be used: 1 2 ml of liquid, and only the bottom of the tube should be covered with solids.

3. The remaining drugs in the experiment can neither be put back into the original bottle, nor discarded at will, let alone taken out of the laboratory, but should be put into the designated container.

l) The spoon must be clean when taking solid medicines. Two or more reagents cannot be used at the same time with one medicine spoon. The spoon must be wiped clean with clean paper after each reagent is taken for the next use.

The two ends of the spoon are two large and small spoons, and a large spoon is used when the amount of solids is large, and a small spoon is used when there is a small amount of solids.

2) When filling the test tube with solid powder, in order to avoid the drug sticking to the nozzle and the wall of the tube, the test tube should be tilted, and the medicine spoon containing the drug should be carefully sent to the bottom of the test tube, and then the test tube should be upright, so that all the drugs fall at the bottom. Or place the tube horizontally, place the solid powder on a paper strip folded into a groove, and then feed it to the bottom of the tube, take out the paper strip, and stand the tube upright.

3) Bulk solid drugs (such as potassium, sodium, white phosphorus, marble, limestone, zinc particles, etc.) need to be taken out with tweezers first, and it should be wiped with clean paper immediately after the tweezers are used for the next use. When putting lumpy drugs or dense metal particles into the test tube, the test tube should be placed horizontally and the drug or metal particles should be placed into the test tube. Later, slowly erect the tube so that the drug or metal particles slowly slide to the bottom of the container so as not to break the tube.

Use a clean, dry spoon to remove the reagent. The two ends of the medicine spoon are two large and small spoons, which are used to take a large amount of solids and a small amount of solids, respectively. It should be used exclusively for the use of the key. Used spoons must be washed and dried before they can be used again.

Be careful not to take more than the specified dosage, and the extra medicine cannot be poured back into the original bottle, but can be placed in the designated container for others to use.

When a certain quality of solid reagent is required, the solid can be weighed on dry paper. Corrosive or deliquescent solids should be weighed on a surface dish or in a glass container.

When adding solid reagents to a test tube (especially a wet test tube), you can use a medicine spoon or place the removed drug on a folded piece of paper and extend it into the tube about 2 3. When adding bulk solids, the tube should be tilted so that it slides slowly down the tube wall so as not to break the bottom of the tube.

When the particles of the solid are large, they can be ground in a clean and dry mortar. The amount of solids contained in the mortar should not exceed 1 3 of the capacity of the mortar.

Toxic drugs should be used under the guidance of teachers.

Walk into the Lab-3 for the use of solid medicines.

Solid: 1. Powder: medicine spoon, paper trough.

Use the medicine spoon to take the medicine and put it into the test tube Use the medicine to put the medicine into the prepared paper trough, put the paper trough into the test tube horizontally, and then stand the test tube upright, and take out the paper tray after the drug enters the test tube.

2. Lumpy: tweezers, medicine spoon.

Take the test tube horizontally with your left hand, take the medicine with tweezers and spoons, place it at the mouth of the test tube, and slowly stand the test tube upright, so that the drug slowly slides down to the low end of the test tube.

If it is granular, take it with forceps. If it is in powder form, use a medicine spoon.

Access to solid and liquid medicines.

Use tweezers to take the lumpy solid (specific operation: first put the container horizontally, put the drug into the mouth of the container, and then slowly erect the container);When taking powdered or small granular medicines, use a medicine spoon or paper tray (specific operation: first place the test tube horizontally, carefully feed the medicine spoon or paper tray containing the drug into the bottom of the test tube, and then make the test tube upright).

How to get solid medicine correctly?

Use a medicine spoon when taking powdered solid drugs, and use tweezers when taking block solid drugs;

In order to save drugs, according to the rules for the use of drugs in the laboratory, when taking chemicals, if the experiment does not specify the dosage, the solid only needs to cover the bottom of the test tube

So the answer is: medicine spoon or tweezers;Cover the bottom of the tube

First in, first out, last in, last out.

Place the label facing outward.

Pick up the label with the label facing inward (palm).

The medicine spoon must be removed.