NF ISO 1575

Tea. Determination of total ash.

Les thés renferment par constitution des éléments minéraux. Le résidu obtenu après incinération est constitué de substances inorganiques peu volatiles ; le résultat dépend du mode opératoire, notamment en ce qui concerne la température d''incinération. Une augmentation du poids des cendres, un changement de composition, peuvent révéler l''addition de matières minérales.

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