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Standard Type : Main
Document No : ISO 1576:1988
Document Year : 1988
Pages : 2
Edition : 2
Section Volume : Tea (ISO/TC 34/SC 8.)
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.