Effective Cleaning Of Pipettes

December 05, 2012

 Chemical, water or other analysis requiring exact measurement and dispensing of liquid reagents relies on the use of pipettes. Some pipettes are disposable, however, reusable glass pipettes are preferred because they are typically of higher quality and are calibrated more exactly. The main disadvantage of using glass pipettes is the difficulty of cleaning them between users.

Some pipette cleaners are simple plastic jugs that fill and siphon water several times. Cleaning is accomplished by means of soaking and flushing. After this process, pipettes are typical placed in an oven for drying. This process can take hours and requires handling of wet pipettes. As a result, the tips are easily broken, rendering the pipettes useless. Another cleaning method is to use a laboratory glassware washer. Miele lab glassware washers equipped with pipette injector baskets and specified cleaning agents are ideally suited for the task and provide repeatable and analytically clean results.

When cleaning pipettes, Miele injection baskets provide remarkably clean results for hard-to-reach interiors. Each pipette is placed tip down in a protective plastic holder, where water and detergent are injected providing thorough cleaning. A heated DI rinse follows to ensure complete removal of trace residues. If HEPA-filtered drying is used, forced hot air will circulate through the pipettes, providing complete drying.

Sources: Laboratory Network.com

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