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ISO 2717:1973

Sulphuric acid and oleum for industrial use — Determination of lead content — Dithizone photometric method

Dec 1, 1973
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.060.30  

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Scope

Applicable to the determination of contents exceeding 1 mg/kg. The principle bases on evaporation of the test portion, dissolution in hydrochloric acid and reduction by hydroxylammonium chloride. Formation of complexes of interferring elements with ammonium citrate and potassium cyanide. Extraction of the lead at a pH of between 8.5 and 10 by a solution of dithizone in chloroform. Elimination of excess dithizone by an ammoniacal solution of potassium cyanide. Photometric measurement in chloroform solution at a wavelength of about 520 nm. Has also been approved by the IUPAC.

Life cycle

NOW

WITHDRAWN
ISO 2717:1973
95.99 Withdrawal of Standard
May 27, 2002

National adoptions

Sulphuric acid and oleum for industrial use — Determination of lead content — Dithizone photometric method

95.99   Withdrawal of Standard

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