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Jan 30, 2024 · You will use a variety of volumetric glassware and other equipment in your laboratory experiments. Whenever possible, you should ensure that the equipment is properly calibrated so that systematic errors do not result from using the equipment to make measurements.
Our volumetric laboratory glassware is available in three main calibration classes: Class AS, Class A and Class B. Below is a quick guide to what each class means so you can better decide if they are suitable for your application.
Class A and AS volumetric glassware is supplied with a batch calibration certificate, where the tolerance and the error of the material comply with an international standard. Laboratories can also acquire class A volumetric glassware with individual calibration, as supplied by some brands.
Jan 6, 2015 · The glassware bears the letter A and is calibrated to half the tolerance level of Class B glassware. It come with a calibration certificate bearing a unique serial number for establishing traceability.
Jul 15, 2021 · 5.1.3 The In-House Identification number is written on “Certificate of Accuracy” given by manufacturer of Class – A Glassware. 5.1.4 New glassware should be calibrated (except Class – A) before it is used for routine analysis.
The use of Class A borosilicate glass for volumetric glassware means accuracy is retained over a longer working lifetime than their soda-lime equivalents. With everyday use, volumetric glassware requires recalibration.
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2.3.2 Class A glassware need only be used where such volumetric accuracy is critical to the performance of the method and, where this is required, the glassware must be calibrated as conforming to Class A tolerances. Sub-Section 2.6 gives guidance on the circumstances where calibration is necessary.
