ISO 3697:1976

Withdrawn

Sodium hydroxide for industrial use — Determination of calcium and magnesium contents — Flame atomic absorption method

Available format(s)

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

Withdrawn date

04-05-2019

Language(s)

English, French

Published date

11-01-1976

Publisher

International Organization for Standardization

Applicable to products having contents of more than 2.5 mg Ca/kg and 0.5 mg Mg/kg if an acetylene-air flame is used or 0.6 mg Ca/kg and 1.0 mg Mg/kg if an acetylen-dinitrogen monoxide flame is used. The principle consists in the acidification of a test portion with hydrochloric acid, aspiration of the solution into an acetylene-dinitrogen monoxide flame or acetylene-air flame. In the latter case, addition of lanthanum ions in order to suppress certain interferences. Measurement of the absorption of the 422.7-nm and 285.2-nm lines emitted by calcium and magnesium hollow-cathode lamps.

DevelopmentNote	Also numbered as BS 6075-9(1981) (09/2005)
DocumentType	Standard
Pages	4
PublisherName	International Organization for Standardization
Status	Withdrawn

Standards	Relationship
UNE 55612:1980	Identical
NFT 20 432 : 76 FD	Identical
NBN T 03 133 : 1980	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 6075-10:1981	Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method)