Abstract / scope
The method consists in extractiing of the total ash with hot water, filtration through ashless filter paper, ignition and weighing of the residue to determine the insoluble ash; calculation of the soluble ash by difference.
ISO 1576:1988Published
Tea — Determination of water-soluble ash and water-insoluble ash
Thé — Détermination des cendres solubles et des cendres insolubles dans l'eau