Usage Methods And Precautions For Reagent Bottles

Usage methods and precautions for reagent bottles

Reagent bottles, as indispensable tools in the laboratory, their usage methods and precautions are of great significance for the accuracy of experimental results and the safety of laboratory personnel. This article will elaborate on the usage methods of reagent bottles and the matters to be noted during their use, in order to help laboratory personnel better master this basic laboratory skill.

Firstly, let's understand the basic classification of reagent bottles. According to the purpose of holding reagents, reagent bottles can be divided into wide-mouth bottles, narrow-mouth bottles, gas collection bottles, dropper bottles, and other types. Wide-mouth bottles are mainly used for holding solid reagents, with a flared neck design that is convenient for taking narrow-mouth bottles are used for holding liquid reagents, also with a flared design to ensure the sealing of the reagents. Gas collection bottles can be used for collecting gases or conducting experiments. Dropper bottles are convenient for taking small amounts of liquid.

When using reagent bottles:

Firstly, it is important to choose the appropriate type of reagent bottle. Based on the physical and chemical properties of the reagent, choosing the suitable reagent bottle is crucial. For example, solid reagents should be placed in wide-mouth bottles, while liquid reagents should be placed in narrow-mouth bottles. For reagents that are prone to decomposition or deterioration, a brown bottle should be used to protect from light. For reagents that are volatile at low boiling points, a sand glass bottle should be used to reduce the evaporation rate. Additionally, some special reagents, such as hydrofluoric acid, due to its special chemical properties, cannot be stored in glass bottles but should be stored in plastic bottles.

When taking reagents:

Laboratory personnel should use a clean horn spoon to take the reagents from the reagent bottle, avoiding contaminating the reagents. The taken reagents should not be poured back into the original bottle to prevent contamination of the entire bottle of reagents. At the same time, it is important to protect the label of the reagent bottle to avoid confusing the types of reagents. The information on the label is crucial for identifying the reagents, so the label should be kept clear and intact during use.

When pouring reagents:

First, place the bottle stopper upside down on a clean tabletop, then hold the side of the reagent bottle with the label, tilt the bottle mouth along the inner wall or through a glass rod gradually to pour out the required amount of solution. After pouring out the solution, it is advisable to pour the remaining drop of solution into the receiving container or into the receiving container through the glass rod to avoid liquid droplets flowing down the outside wall of the bottle. In addition, once the solution has been poured out, it should not be poured back into the reagent bottle to avoid contaminating the reagents.

Apart from taking and pouring reagents, the sealing property of the reagent bottle is also an important aspect to be noted during use. The original bottle should be equipped with the original bottle stopper, and the number of the bottle and the stopper should be consistent to tightly close the bottle mouth and prevent solution evaporation and concentration changes. At the same time, when the sealed reagent bottle is not in use, a paper strip should be placed between the flared surface of the bottle mouth to prevent the bottle stopper from sticking. Moreover, reagent bottles should not be used as heating vessels. Laboratory reagent bottles are designed for storing liquids and their materials and structures are not suitable for heating. Heating the reagent bottle may cause it to crack or leak, posing a danger to laboratory personnel.