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SRPS ISO 5993:2014

Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption spectrometric method

Feb 28, 2014

General information

90.93     Oct 20, 2023

90.20    Oct 15, 2028

ISS

H047

International Standard

71.060.40  

English  

Plan za 2013. godinu.

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Scope

Covers a method applicable to liquid or solid products having mercury contents greater than 0,02 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion to mercury(II) ions by potassium permanganate in the presence of sulphuric acid, reduction of the excess oxidant by hydroxylammonium chloride, reduction of the mercury(II) ions to mercury by tin(II) chloride, entrainment of the mercury in air or nitrogen, passage of the gaseous mixture through a measuring cell, and measurement of the absorption at a wavelength of 253,7 nm.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS H.B8.678:1992

NOW

PUBLISHED
SRPS ISO 5993:2014
90.93 Standard confirmed
Oct 20, 2023

Related project

Adopted from ISO 5993:1979