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Status : Active
Standard Type : Main
Document No : ISO 4316 : 1977
Document Year : 1977
Pages : 2
Edition : 1
Section Volume : Surface active agents (ISO/TC 91.)
The determination is carried out in the following way: Potentiometric measurement of the potential difference between a glass electrode and a reference electrode dipping in an aqueous solution of the sample. This method is only applicable when so indicated in the specific standard for each product.