Understanding Volumetric Glassware
- By Southern Labware Inc
- Jan 1, 2017
Volumetric glassware is designed to measure a predefined volume of liquid or to measure the volume of a delivered liquid. Volumetric glassware includes, volumetric flasks, volumetric pipettes, burettes, serological pipettes, mohr pipettes, graduated cylinders and graduated mixing cylinders. Since many labs are regulated by different agencies, it is important to understand the different types of calibration, classification and certifications in order to choose the correct piece of glassware for your laboratory.
Burettes and pipettes are calibrated TD "To Deliver" which means the delivered quantity of liquid corresponds to the capacity listed on the glassware. Volumetric flasks and graduated cylinders are calibrated TC "To Contain" which means the contained quantity of liquid corresponds to the capacity listed on the glassware.
Our Class A volumetric glassware is available with a Batch Certificate or an Individual Certificate. Batch Certificates list the mean value contained, standard deviation and batch number of the glassware. Individually Certified glassware have an individual serial #, mean value, standard deviation, measured uncertainty, as well as the batch number listed on the certificate. All Class A glassware is manufactured to ASTM standards using state-of-the-art manufacturing and calibration equipment. The calibration laboratory is NABL accredited in accordance with ISO 17025:2005 standards. Results of calibration are guaranteed for precision as per DIN, ISO, USP and ASTM Standards.
Our Class B volumetric glassware feature tolerances that are about twice that of comparable glass A glassware. Class B glassware is used in labs for basic measurements of liquids.
When you are trying to decide the level of calibration needed in your lab keep in mind that our Class A Individually Certified volumetric glassware is accepted in calibration laboratories worldwide. Compare our prices to other leading glassware manufacturers and the choice will be clear.
Individual Certificate
Batch Certificate
