Cleaning Laboratory Glassware - Sigma-Aldrich
Pipets and burets are best rinsed by attaching a piece of rubber tubing to the faucet and then attaching the delivery end of the pipets or burets to a hose, allowing the water to run through them. If the tap water is very hard, it is best to run it through a deionizer before using. Rinse the glassware in a large bath of distilled water.
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