Fruit and vegetable products — Determination of benzoic acid content (benzoic acid contents greater than 200 mg per litre or per kilogram) — Molecular absorption spectrometric method
NORMA vydaná dňa 1.11.1983
Označenie normy: ISO 6560:1983
Dátum vydania normy: 1.11.1983
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: The method consists in extracting the acid from an acidified test portion using diethyl ether, nitrating followed by reduction and Mohlers reaction modified with hydroxylaminehydrochloride, measuring the absorbance of the red complex obtained with a suitable spectrometer. For determining lower concentrations, see ISO 5518.