What reagents can be put back after use?

In fact, you don't understand the rules for the use of medicines.

The rule is that the use of excess medicines cannot be put back into the original bottle!! If you don't use it, you can put it back!!

For example, when I weigh 10g of sodium chloride, I take too much of the medicine spoon, and I can put the excess back on the medicine spoon!!

Basically all medicines can be treated like this!!

Of course it must be pollution-free!!

If it is a reagent, it will definitely be mixed with other reagents in the experiment, and of course it cannot be put back. The sodium is cut from a large piece, and that large piece must be put back or it will be too wasteful.

In short, the principle is not to contaminate the reagent in the reagent bottle, and judge it according to the specific situation.

From a purely chemical point of view, general reagents cannot be put back.

However, there are some special circumstances, such as if the reagent is discharged into the environment, it will pollute the environment and be toxic, or the reagent itself is very valuable, in order to save the reagent, it can be put back under the condition of ensuring that it is not polluted.

Agree with the upstairs. In principle, the amount of drugs must be used according to the amount, and the more can not be returned to the reagent bottle or jar. However, if you use a very inert solid, it does not matter if it is exposed to air, so you can also consider putting it back.

For example: manganese dioxide, limestone, etc.

You can't put back the used reagent, and the sodium you cut out hasn't been used, so of course you can put it back. Generally, whether to put it back or not depends on the situation.

Strictly speaking, once the reagent is removed, it is forbidden to put it back!

Abstract: Before preparing to buy an antigen test kit for self-testing at home, you can first explain how much an antigen test kit is, generally speaking, ** is about 22-30 yuan a piece, and it costs about three or four hundred yuan to buy a box. So what should I do if the test number kit I bought home runs out?

It is divided into two situations, isolate the observers, put them into sealed bags and be disposed of by the management personnel with reference to medical waste or according to procedures; The negative of the community residents is disposed of as general garbage, and the positive ones are handed over to the medical institutions for disposal according to medical waste when the people are transferred. For the specific structure and processing method of the antigen test kit, let's take a look in the article! 1. How much is the antigen test kit.

The National Health Commission issued the "New Coronavirus Antigen Detection Application Plan", which means that self-test kits can also be bought in China, but in fact, foreign countries have long started to use new crown self-test kits made in China. How much does the new crown antigen test kit** cost?

At present, in the market, the new crown antigen test kit** is about 22-30 yuan a piece, and it costs about three or four hundred yuan to buy a box, but it depends on how many copies of the first box are weighed in the morning, because the new crown self-test kit** produced by different manufacturers will be different.

In general, the new crown antigen test kit** depends on how many copies there are in a box, if there are 20 copies, a box will cost more than 400 yuan. Now you can buy on an online shopping app, and you need to see the pharmacy notification offline.

2. How to dispose of the antigen test kit after it is used up.

After knowing the ** of the antigen test kit, what should I do with it after I buy it and use it at home?

1. Quarantine observers: Regardless of whether the test result is negative or positive, all used sampling swabs, sampling tubes, test cards, etc. will be packed into sealed bags and disposed of by the management personnel with reference to medical waste or according to procedures.

2. Community residents: If the test result is negative, all nasal swabs, sampling tubes, test cards, etc. after use are put into sealed bags and disposed of as general garbage; If the test result is positive, it shall be handed over to the medical institution for disposal according to medical waste when the personnel are transferred.