Active standard | Published: 01/08/1981

ISO 5520:1981

Fruits, vegetables and derived products — Determination of alkalinity of total ash and of water-soluble ash
(Fruits, légumes et produits dérivés — Détermination de l´alcalinité des cendres totales et des cendres solubles dans l´eau)

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Detail information

Designation: ISO 5520:1981

Publication date: 01/08/1981

Pages: 3

Country: International technical standard

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Anotation

Description / Abstract: After incineration of the product at 525 +/- 25 degrees centigrade the method consists in a) in the case of total ash: addition of an excess of standard volumetric sulphuric acid solution and back titration with standard volumetric sodium hydroxide solution, b) in the case of water-soluble ash: extraction of the ash with hot water and neutralization of the aqueous extract with standard volumetric sulphuric acid solution.

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