SSH ISO 6635:1984

Fruits, vegetables and derived products — Determination of nitrite and nitrate content — Molecular absorption spectrometric method

Publication date: Nov 23, 2022

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Current stage: 60.60 Effective date: Nov 23, 2022

Originator: DPS

Owner: DPS/KT 360

Type: International Standard

ICS: 67.080.01

Languages: English

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Status: Published

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The method consists in extracting a test portion with hot water, precipitating the protein by addition of solutions of potassium hexacyanoferrate(II) and zinc acetate, and filtrating the precipitate. Further, reduction of the nitrate to nitrite by metallic cadmium (only for determining the nitrate). Then addition of sulfanilamide chloride and N-(1-naphtyl)ethylenediamine and measurement of the red complex obtained at a wavelength of 538 nm.

SSH ISO 6635:1984

Fruits, vegetables and derived products — Determination of nitrite and nitrate content — Molecular absorption spectrometric method

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Adopted from ISO 6635:1984