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Glavni meni

ISO 5993:1979

Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption spectrometric method
1. 9. 1979.

Опште информације

90.93     20. 10. 2023.

ISO

ISO/TC 47

Međunarodni standard

71.060.40  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 5993:1979
90.93 Odluka o potvrđivanju standarda
20. 10. 2023.

Nacionalna preuzimanja

Natrijum-hidroksid za industrijsku upotrebu — Određivanje sadržaja žive — Besplamena atomska apsorpciona spektrometrijska metoda

90.93   Odluka o potvrđivanju standarda

Natrijum-hidroksid za industrijsku upotrebu - Određivanje sadržaja žive - Metoda atomske apsorpcije bez plamena

95.99   Povučen