Produits dérivés des fruits et légumes — Détermination de la teneur en zinc — Partie 3: Méthode spectrométrique à la dithizone

The method consists in decomposing of organic matter, neutralizing of the solution obtained, adding of 1,5-diphenylthiocabazone solution, extracting of the zinc complex thus furmed with chloroform and measuring of the absorbance of the extract at a wavelength of 538 nm.