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Discussion on Reagent Safety Management in Chemical Testing Laboratory

Date:2021/01/06 14:11:01
In chemical testing laboratories, there are many types of chemical reagents. Most chemicals are toxic and dangerous. Therefore, the safety of reagents in chemical testing laboratories should be strengthened, especially the management of dangerous chemical reagents, such as inflammable and explosive. The chemical reagents and highly toxic chemical reagents are the problems that relevant management personnel urgently need to solve.
1 Introduction
In chemical testing laboratories, chemical reagents have the characteristics of many varieties, frequent consumption, and high risk. For example, flammable and explosive chemical reagents, toxic chemical reagents, strong corrosive chemical reagents, and strong oxidizing chemical reagents. After receiving such chemical reagents, they must be stored in a special dangerous reagent cabinet. , It is necessary to take special safety precautions to avoid the improper use of chemical reagents, which endangers the health of experimenters and damages the experimental equipment. This article makes an analysis based on the safety management issues of the purchase, storage and storage of reagents in chemical testing laboratories.
2 Collection of laboratory chemical reagents
2.1 According to the experiment notice
Be sure to pick up the chemical reagents in accordance with the experimental notification form, and the laboratory management personnel need to prepare the chemical reagents. Normally, the chemical reagents can only be collected after the relevant personnel have gone through the registration procedures. Toxic and hazardous chemical reagents can only be collected after approval by specialized personnel and institutions [1].
2.2 Number of reagents received
In terms of the quantity of chemical reagents received, the management personnel of the chemical testing laboratory need to be weighed and recorded in time on the gross weight label of the container to facilitate future accounting and vouchers.
2.3 View the drug report
When receiving chemical reagents or chemicals, it is necessary to clarify whether the name indicated on the container is the chemical reagent or chemical that needs to be collected for the experiment. In addition, it is necessary to identify the signs of drug hazards and make it clear whether the chemical reagents or drugs are hazardous. In order to ensure the safety of experimenters, it is necessary to check the drug report sheet and reagent safety data sheet in detail to ensure that the experiment proceeds smoothly.
2.4 Apply for reporting in advance
When receiving flammable, explosive, highly toxic, highly corrosive, strong oxidizing and other dangerous flower reagents, you need to apply for reporting in advance. The amount of reagents received should be proportional to the amount, and the reagents should be configured successfully once. . In the distribution of highly toxic chemical reagents, the principle of first-in, first-out must be adhered to. During the distribution process, accurate registration must be carried out, including the amount of reagents received, the time of distribution, and the person who handles the reagents. For the collection of hazardous chemical reagents, two people must collect and return them together, otherwise, hazardous chemical reagents cannot be issued.
3 Storage of laboratory chemical reagents
3.1 The storage of chemical reagents should depend on their nature
Generally, chemical reagents are stored in glass bottles. For reagents that have a strong corrosive effect on glass, such as hydrofluoric acid, sodium hydroxide and other reagents, they need to be stored in polyethylene plastic bottles, which are easily oxidized and deliquescent by air. It needs to be sealed during storage. Matters prone to photosensitization should be stored in colored glass bottles and kept in a dark place. Reagents that are easily decomposed by heat and reagents with lower boiling points need to be stored in a cold place, and dangerous reagents need to be stored in a safe. It is stored in the tank, and radioactive reagents need to be stored in the tank.
3.2 Do regular maintenance of chemical reagents
In order to prevent the chemical reagents failing and deteriorating, it is necessary to do regular maintenance of the chemical reagents to avoid the influence of the experimental results due to improper storage of the chemical reagents, and to avoid the waste of chemical reagents. To a certain extent, improper customs declaration of chemical reagents may be possible Will lead to chemical accidents. Therefore, in chemical testing laboratories, the declaration of chemical reagents is particularly important, which can make the chemical data obtained in the experiment have reliability. The deterioration of chemical reagents is closely related to the influence of the external environment. Oxygen, carbon dioxide, water vapor, acid-base substances in the air, temperature, light and other factors can the deterioration of chemical reagents, causing chemical reagents to undergo oxidation, reduction, deliquescence, weathering, etc. Phenomenon such as crystallization, dilution, corrosion, decomposition, volatilization, sublimation, polymerization, mold, discoloration and explosion [2]. Therefore, relevant personnel need to check the storage of chemical reagents regularly or irregularly. If chemical reagents are found to be deteriorated, they must be properly handled according to regulations. Generally, the storage of chemical reagents should not exceed two years, and the reference reagents should not exceed one year.
4 Storage of chemical reagents in chemical testing laboratories
4.1 Storage of inorganic chemical reagents
Store according to the type of reagent. Usually, the chemical reagents of tears are classified according to the position of metal ions in the periodic table left to right, first salt and then acid salt, such as sodium salt—sodium sulfide, sodium carbonate, sodium silicate, sodium nitrite, sodium sulfate, Sodium thiosulfate, calcium salt, etc. Elemental elements are classified as metals, non-metals, or elementary elements in the periodic table. Oxides are also classified according to the order of the groups of the periodic table. The non-oxygen acids in the acids need to be classified left to right and top to bottom according to the acid radical elements in the periodic table, such as hydrohalic acid, hydrofluoric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, etc. . Oxyacids need to be classified according to the family of acid-forming elements, such as boric acid, nitric acid, sulfuric acid, phosphoric acid, etc. Alkaloids are generally classified according to the groups of metal elements in the periodic table, such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide and so on.
4.2 Storage of organic chemical reagents
Organic chemical reagents need to be classified according to functional groups, such as hydrocarbons, hydrocarbon derivatives, carbohydrates, nitrogen-containing compounds, and organic ionomolecular compounds. The reagents are arranged in order according to the purity level of the reagents, and the configured solution and solid reagents need to be searched separately.
4.3 Pay special attention to the storage of hazardous chemical reagents
Hazardous chemical reagents have highly chemically active substances, such as flammable and explosive reagents, corrosive reagents, toxic reagents, oxidants, radioactivity, and a series of other "strong" chemical substances harmful to the human body and the environment. "Activities" may even decompose and threaten lives And property safety, so it must be taken seriously. According to relevant national regulations, the packaging of hazardous chemical reagents should carry hazard signs and hazard code numbers, and there are written instructions in the relevant reagent manuals [3].
5 Precautions for the safe of chemical reagents
The taken medicine cannot be poured back into the original reagent bottle. It needs to be capped immediately after taking it out. Do not place it randomly to avoid wearing a crown. For safety reasons, before using chemical reagents, we must first fully understand its safety performance-whether it is flammable, explosive, corrosive, toxic, strong oxidizing, etc. In order to ensure safety, some safety precautions must be taken during to avoid damage to laboratory personnel and laboratory equipment due to improper.

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