1, the choice of cleaning agent quartz and glass colorimetric dishes can not be cleaned with a strong alkali, because strong alkali will corrode polished colorimetric dishes. Only use lotion or 1% -2% detergent immersion, and then use ultrasonic cleaning machine wash (do not need a brush). After ultrasonic cleaning, need dry water molecules.
2. Drying of glass and plastic containers: glass and plastic containers used in biochemical experiments often need to be dried, usually in a 110 ° C-120 ° C oven or dryer, rather than being washed with ketone and then blown dry, this can result in residual organic matter covering the inner surface of the container, which interferes with the biochemical reaction.
The quantitative glass apparatus can not be heated. Generally, take control dry or in turn with a small amount of alcohol and ether wash, and then blow-dry with warm air. Nitrocellulose plastic centrifuge tube heating will explode, so must not be dried in the oven, can only use cold air drying. The surface of newly purchased glassware often adheres to free alkaline substances. Before cleaning with an ultrasonic cleaning machine, 1% ~ 2% hydrochloric acid solution should be used to soak (not less than 4 hours), and then dry after cleaning.
