AENOR UNE 55594:1982 Surface agents. Sulfuric acid and oleums used as raw materials for detergent formulations. Determination of the fixed calcined residue. Gravimetric method.
1982AENOR UNE 55594:1982 Surface agents. Sulfuric acid and oleums used as raw materials for detergent formulations. Determination of the fixed calcined residue. Gravimetric method.