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>ISO Standards>ISO 5992:1979-Sodium hydroxide for industrial use-Determination of mercury content-Dithizone photometric method
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immediate downloadReleased: 1979
ISO 5992:1979-Sodium hydroxide for industrial use-Determination of mercury content-Dithizone photometric method

ISO 5992:1979

Sodium hydroxide for industrial use

CURRENCY
42 EUR
Standard´s number:ISO 5992:1979
Pages:5
Edition:1
Released:1979
Language:English
DESCRIPTION

ISO 5992:1979


Covers a method applicable to liquid or solid products having mercury contents greater than 0,05 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, extraction in chloroform of the complex formed, and photometric measurement of the complex at a wavelength of about 490 nm.
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