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Commonly used glassware washing
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Commonly used glassware washing

Date:2022-08-11 17:49:20 Thursday
Summary:Glass instruments commonly used in laboratories such as beakers, test tubes, burettes, pipette tip, volumetric flasks, etc. The instrument will be stained with oil, scale, rust, etc. during use. If it is not cleaned in time and completely after use, ......

Glass instruments commonly used in laboratories such as beakers, test tubes, burettes, pipette tip, volumetric flasks, etc. The instrument will be stained with oil, scale, rust, etc. during use. If it is not cleaned in time and completely after use, it will cause error in the results, and even have an extremely adverse impact on the life and performance of the instrument. Therefore, the glassware used in the experiments must be washed. Here are some cleaning methods for glassware.

Simple instruments with easy-to-remove substances, such as test tubes, beakers, etc., are first rinsed with tap water, then brushed with a test tube brush dipped in synthetic detergent, and finally rinsed with tap water. When the instrument is inverted, a uniform water film is formed on the wall of the instrument, and it has been cleaned when it does not flow down in strands.

For greasy glassware, first wash with alkaline alcohol detergent, then wash with washing powder or soapy water, and then rinse with tap water.

Vessels with rust and scale should be soaked in (1+3) hydrochloric acid lotion, and then rinsed with water.

For utensils contaminated with petroleum jelly, first wipe off the petroleum jelly, then wash and boil with washing powder or soapy water, and rinse with tap water after taking them out.

Some glass instruments with relatively fine and complex structures, such as volumetric flasks, pipettes, etc., cannot be brushed with a brush, but can be soaked in washing liquid for a certain period of time before cleaning.

Do not wipe the cleaned glassware with hands, cloth or paper to avoid re-contamination.
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