International Standard
ISO 5520:1981
Fruits, vegetables and derived products — Determination of alkalinity of total ash and of water-soluble ash
Reference number
ISO 5520:1981
Edition 1
1981-08
International Standard
Read sample
ISO 5520:1981
11574
Published (Edition 1, 1981)
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.

ISO 5520:1981

ISO 5520:1981
11574
Language
Format
CHF 42
Convert Swiss francs (CHF) to your currency

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.

General information

  •  : Published
     : 1981-08
    : Close of review [90.60]
  •  : 1
     : 3
  • ISO/TC 34/SC 3
    67.080.01 
  • RSS updates

Life cycle

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)