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ISO 3197:1975

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Sodium hydroxide for industrial use — Determination of chlorides content — Photometric method

Available format(s)

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

Withdrawn date

18-04-2019

Language(s)

English, French

Published date

01-03-1975

€60.00
Excluding VAT

Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50 mg/kg the method specified in ISO 981 shall be used. The principle consists in the quantitative displacement of the thiocyanate ions of the mercury(II) thiocyanate by the cloride ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red). Photometric measurement of the colour at a wavelength of about 450 nm.

DevelopmentNote
Also numbered as BS 6075-7(1981) (09/2005)
DocumentType
Standard
Pages
3
PublisherName
International Organization for Standardization
Status
Withdrawn

Standards Relationship
NBN T 03 131 : 1980 Identical
NFT 20 430 : 76 FD Identical
UNE 55602:1978 Identical

BS 6075-11:1981 Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (flameless atomic absorption method)
BS 6075-8:1981 Methods of sampling and test for sodium hydroxide for industrial use Determination of sulphate content
BS 6075-9:1981 Methods of sampling and test for sodium hydroxide for industrial use Determination of calcium and magnesium contents
BS 6075-10:1981 Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method)

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