This standard establishes a gravimetric method for the determination of sulfate ions in an aqueous extract of clay raw materials for the ceramic industry.
1993GOST 21216.8-1993 Clay raw materials. Method for determination of sulphate ions in water extract
0000 GOST 21216.8-1981
GOST 21216.8-1993 Clay raw materials. Method for determination of sulphate ions in water extract was changed to GOST 21216-2014 Clay raw materials. Test methods.