At what temperature is volumetric glassware generally calibrated?

Volumetric glassware is typically calibrated at a standard temperature of 20 degrees Celsius. This temperature is chosen as it serves as a common reference point for many laboratory measurements and is close to room temperature in many settings. Calibrating glassware at this temperature ensures consistency in the measurements achieved, as the volume of liquids can change with temperature due to thermal expansion. Therefore, using 20 degrees Celsius provides a common baseline for laboratories to compare results and reduces potential discrepancies caused by variations in temperature during measurement or handling. This practice enhances the reliability and accuracy of analytical results in wastewater analysis and other laboratory applications.