Abstract
Applicable to products having contents, expressed in nitrogen, of 2 mg/kg or more. Oxidation of nitrogen(III) of a test portion to nitrogen(V) by potassium permanganate. Reaction of nitrogen(V) with 3,4-xylenol under specified conditions to form a nitrate derivative. Distillation of the nitrate derivative and absorption in a sodium hydroxide solution. Spectrophotometric measurement of the yellow coloured nitrophenol at a wavelength of about 435 nm. Has also been approved by the IUPAC.
General information
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Status : WithdrawnPublication date : 1979-02
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Edition : 1Number of pages : 4
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- ICS :
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Food additives
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Salts
Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
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Now withdrawn
ISO 5375:1979
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