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Hydrolytic resistance of inner surfaces incl. concentration of arsenic

The partial solubility of glass containers’ inner surface by attack of water is described by holding the container’s surface in an autoclave at a temperature of 121 °C for one hour in distilled water.

During this procedure the alkaline components of the inner surface are extracted. After that, their content in the solution is determined by titration with diluted muriatic acid. Accordingly the alkaline contents the glass is divided in container classes. As an alternative method the element analysis with the aid of atomic absorption spectroscopy or ICP-OES is on hand.

On demand the content of arsenic of the extraction solution can be measured by an atomic absorption spectroscopy hydride system.

(Samples: glass containers)