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ISO 2221:1972

Formaldehyde solutions for industrial use — Limit test for inorganic chlorides

Dec 1, 1972
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.080.80  

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Scope

The method, as specified, is applicable when the required limit is not greater than 0,05 % and not less than 0,0005 %. If the required limit lies outside that range, the mass of the test portion should be changed. The principle of the test consists in comparison of the turbidity obtained by the addition of silver nitrate solution to a solution of the sample, in the presence of nitric acid, with that similary produced from a chloride solution of known concentration.

Life cycle

NOW

WITHDRAWN
ISO 2221:1972
95.99 Withdrawal of Standard
May 27, 2002

National adoptions

SRPS H.B8.279:1983  
ISS

Formaldehyde solutions for industrial use — Limit test for inorganic chlorides

95.99   Withdrawal of Standard

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