The storage of chemical reagents should be based on their characteristics

General test reagents can be checked in glass bottles; test reagents that have the actual effect of severe corrosion on glass, such as hydrofluoric acid and sodium hydroxide, should be checked in polyethylene plastic bottles; those that are easily oxidized, differentiated, and deliquescent by air Test reagents should be sealed for inspection; test reagents that are easy to be decomposed by light should be checked in colored glass bottles and stored in a dark place; those that are easy to be decomposed by heat and low boiling point solvents should be stored in a cold place; highly toxic test reagents should be stored in a safe; radioactive The test reagents should be stored in lead tanks.

Do periodic maintenance of chemical reagents

Once the chemical reagents are not stored properly, they will become invalid and qualitatively change, which will affect the actual effect of the test, and lead to the consumption of materials, and even accidents may occur. Therefore, storing and storing experimental reagents scientifically and reasonably is of great practical significance for ensuring the smooth development of experiments and obtaining reliable experimental data and information. The qualitative change of chemical reagents is mostly due to the influence of the external environment, such as oxygen, carbon dioxide, water vapor in the air, acid and alkaline materials in the air, ambient temperature, light, etc., which can cause the chemical reagents to oxidize, Reduction, deliquescent, weathering, crystallization, dilution, corrosion, decomposition, volatilization, sublimation, polymerization, mildew, discoloration and explosion and other transformations. Regularly check the storage conditions of the chemical reagents in the storage. If the storage period or qualitative change is exceeded, it should be reported as soon as possible, and properly disposed of (degraded or damaged) and written off in accordance with regulations. In a routine inspection environment, the storage of general chemical reagents should not exceed 2 years, and the reference test reagents should not exceed 1 year.

In order to prevent the influence of the environment and other reasons, once all the chemical reagents are taken out, they cannot be put into the storage container: it should be the experimental reagents that must be collected or the designated and returned experimental reagents. Chemical test reagents that are moist or easily oxidized or change in quality must be sealed for inspection to prevent moisture absorption, oxidation, or change in quality. Inventory inventory should be carried out regularly, and the reasons for errors and omissions should be checked as soon as possible, and reported to the supervisor or department for resolution.

Chemical reagents should be stored in reagent bottles, capped tightly, and placed on a stable cabinet shelf to ensure safety. And the placement should be neat and orderly, and easy to take. All chemical reagents should be affixed with labels, indicating the name, concentration and preparation time of the experimental reagent solution. The size of the label should be compatible with the size of the reagent bottle, the handwriting should be clear, the font should be neatly written, and it should be glued to the middle of the bottle slightly above the position to make it neat and beautiful. The label can be coated with molten paraffin for protection. Pay special attention to safety when checking chemical reagents. The place where the reagents are placed should be cool, dry and well ventilated. Due to the various types of test reagents, general test reagents are classified into two categories: inorganic and organic, and special test reagents and dangerous test reagents are stored separately.