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ISO 2222:1972

Formaldehyde solutions for industrial use -- Limit test for inorganic sulphates

Üldinfo
Kehtetu alates 27.05.2002
Tegevusala (ICS grupid)
71.080.80 Aldehüüdid ja ketoonid
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
Põhitekst
The specified method is applicable when the required limit is not greater than 0,1 % and not less than 0,001 %. If the required limit lies outside that range, the mass of the test portion should be changed. The principle ot the test consists in comparison of the turbidity obtained by the addition of barium chloride solution to a solution of the sample, in the presence of hydrochloric acid, with that similarly produced from a sulphate solution of known concentration.
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