Measuring the low OH content in quartz glass

In 1975 Philips Lighting started with the production of quartz glass tubes for lighting applications. The OH content is an important parameter of quartz glass. Every batch quartz glass tubes supplied to a customer is analysed and has a guaranteed OH content. Because there are different methods to measure and calculate the OH content, the ‘Philips Lighting method’ is presented in this paper. Hopefully, this paper sets a standard for the future (low) OH analyses in quartz glass.