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ISO/R 1982:1971

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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 iron content 2,2'- Bipyridyl photometric method

Available format(s)

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

Withdrawn date

10-05-2019

Language(s)

French, English

Published date

01-05-1971

€60.00
Excluding VAT

The method is applicable to the determination of iron contents greater than 0,0001 % (m/m). The principle consists in evaporation of a test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of iron(II)-2,2' -dipyridyl complex in ammonium acetate medium. Photometric measurement of the coloured complex at a wavelength of about 522 nm.

DocumentType
Standard
Pages
4
PublisherName
International Organization for Standardization
Status
Withdrawn

Standards Relationship
BS 4367:1968 Similar to
NBN T 03 038 : 1979 Identical
NFT 20 253 : 1968 Similar to

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