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ISO 1981:1977

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Nitric acid for industrial use Determination of nitrous compounds Titrimetric method

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

10-05-2019

Language(s)

English, French

Published date

01-11-1977

€60.00
Excluding VAT

Two cases are considered: content of nitrous compounds, expressed as HNO2, equal to or greater than 0,01 % (m/m) and content of nitrous compounds, expressed as HNO2, less than 0,01 % (m/m). The principle consists in oxidatiuon of the compounds present in a test portion by an excess of standard volumetric potassium permanganate solution. Addition of an excess of a standard volumetric iron(II) sulphate solution, and titration of this excess with a standard volumetric potassium permanganate solution. Replaces ISO Recommendation R 1981-1971.

DocumentType
Standard
Pages
3
PublisherName
International Organization for Standardization
Status
Withdrawn

Standards Relationship
NBN T 03 037 : 1979 Identical
BS 5688-5:1979 Identical
BS 4367:1968 Similar to

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