Which glassware is volumetric

Here are a few tips to ensure you choose the right volumetric products for your application: Graduated products are accurate, right?

Volumetric glassware is a class of glass vessels that are calibrated to contain or deliver specific volumes of substances. Although many glassware items are graduated i. Borosilicate vs Soda-lime Volumetric glassware can be made from both 3. Borosilicate glass is much more chemically resistant than soda-lime glass. As a result, borosilicate should be used where the longer term exposure to chemicals is more likely, such as the storage of solutions in volumetric flasks.

Soda-lime glass can be used with less aggressive chemicals, or where long term exposure to chemicals is unlikely, such as pipettes. Class AS burettes and pipettes are calibrated to the same accuracy tolerances as Class A, but are designed to permit a more rapid outflow time than the standard Class A equivalents. This accuracy variant is used for pipettes and Burets. Volumetricinstruments should be cleaned immediately after use either manually in an immersion bath or mechanically in a laboratory dishwasher.

Make sure that the cleaning temperature is low, the residence time is short, and the alkalinity of the cleaning medium is also low. Volumetric instruments can then be dried at max. The use of abrasive cleaning methods is not recommended at any time as this can damage the surface. Cleaning in an ultrasonic bath is possible, however, contact with the sound membranes should be avoided.

Dispensers are piston lifting attachments that can be used to measure defined quantities of liquid easily, quickly, and precisely, for example, from a laboratory bottle.

When our dispensers are screwed onto laboratory bottles, the previously set quantity of liquid is sucked into the cylinder by an upward movement of the piston — accurate every time. The subsequent downward movement ejects the quantity of liquid via a cannula. With this principle, there is no need to adjust the meniscus. For all Class A and AS volumetric instruments there is a retrace code which can be used to easily download a batch certificate on our website.

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