ASTM International

Standard Test Method for Soluble Sulfate in Ceramic Whiteware Clays (Photometric Method)
 N C867

Annotation

This test method covers the determination of soluble sulfate ions present in water or a filtrate by means of a photometer measuring the turbidity of precipitated barium sulfate. A method of standardizing the photometer for this test method is also given.

Soluble sulfate ions may be removed from clays or clay-water slurries by leaching with water during mixing and subsequent filter pressing. To remove all the sulfate ions would require an impractical number of washings; therefore, this test method should be considered a control test and not a quantitative analysis for SO4 ions.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Автоматический перевод:

Метод стандартной пробы для разрешимого сульфата в керамических глинах Whiteware (светоизмерительный метод)

Этот метод испытаний покрывает определение разрешимых ионов сульфата, существующих в воде или фильтрате посредством фотометра, измеряющего мутность ускоренного барита. Метод стандартизации фотометра для этого метода испытаний также дан.