This International Standard specifies a gravimetric method for determining the sodium sulfate content of sodium sulfate for industrial use. The method is applicable to products for which all impurities are not known or measured, i.e. in cases where the calculation and gravimetric methods specified in is 3237 cannot be used.
NBN T 03-179-1980 history
1979NBN T 03-179-1980 Sodium sulphate for industrial use - Determination of sodium sulphate content - Gravimetrie method