Chemical resistance of glass used in the production of laboratory glassware. Methods for determination of hydrolytic resistance of the interior surfaces of glass containers. Determination by flame photometry and classification

This technical specification establishes a standardized methodology for evaluating the resistance of glass materials used in laboratory glassware to chemical corrosion, specifically focusing on the internal surface resistance to hydrolysis in glass containers. It details the second section of the fourth part, which employs flame photometry to determine the extent of glass degradation when exposed to water. The procedure involves precise sample preparation and measurement techniques to quantify the amount of alkali and alkaline earth metals leached from the glass surface. Based on the analytical results, the glass is classified into distinct categories reflecting its hydrolytic performance. This approach ensures consistent assessment of glass stability across different batches and manufacturers. The standard provides clear criteria for testing conditions and calculation methods to guarantee reproducibility and accuracy. By defining these parameters, it supports the quality assurance processes for laboratory glass products. The information contained herein serves as a reference for manufacturers and testing laboratories to verify compliance with required performance levels without assessing the standard's broader impact or importance.