Aktivní norma | Vydána: 01.06.1972

ISO 2122:1972

Sodium and potassium silicates for industrial use — Preparation of solution of products not easily soluble in boiling water and determination of matter insoluble in water
(Silicates de sodium et de potassium a usage industriel — Mise en solution des produits difficilement solubles dans l´eau bouillante et détermination de l´insoluble dans l´eau)

Dostupné jazyky: Anglicky, Francouzsky

Dostupné provedení: Elektronické PDF, Tištěné

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Podrobné informace

Označení: ISO 2122:1972

Datum vydání: 01.06.1972

Stran: 3

Země: Mezinárodní technická norma

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Anotace

Description / Abstract: The method is applicable to products corresponding to the general formula M2O . xSiO2, where the values of x lie between 1,5 and 3,5 in the case of sodium silicates and 1,9 and 3,9 in the case of potassium silicates. Because of the difficulty ancountered in dissolving fine particles of these products, the sample is first sieved to remove these fines. The procedure consists in dissolution of the test portion in carbon dioxide-free water, by treatment in an autoclave. Filtration and weighing of the insoluble matter on a tared filter crucible. Dilution of the filtrate to a given volume, from which aliquot samples are taken in order to carry out the different determinations.

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