0 Items
My account
Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

ISO 3697:1976

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

Nov 1, 1976
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.060.40  

French   English  

Buying

Withdrawn

Language in which you want to receive the document.

Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 3697:1976
95.99 Withdrawal of Standard
May 27, 2002

REVISED BY

ABANDON
ISO/CD 3697

National adoptions

SRPS H.B8.673:1992  
ISS

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

95.99   Withdrawal of Standard

H047 more