ICUMSA Method GS2-9 (2024)

Colour in Solution of Sugars with more than 20 and less than 600 ICUMSA® Units and pH Adjustment with TEA/HCl Buffer – Accepted

ICUMSA Method GS2-9 (2024)
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Method Technique:

Abstract:
Formerly: The Determination of Sugar Solution Colour at pH 7.0 - Accepted This Method is suitable for determination of the colour in all crystalline and powdered sugars having a colour less than or equal to 600 ICUMSA Units (IU). The absorbance of a filtered solution at pH 7.0 is measured at 420 nm in a spectrophotometer. A TEA/HCl buffer is used to adjust the pH of the solution. The Method has Accepted Status and if a choice of Method is available then ICUMSA recommends that Method GS9-8 is used preferentially. For sugars less than or equal to 50 IU, the absolute difference between two results obtained under repeatability conditions should not be greater than 3 IU and under reproducibility conditions not greater than 7 IU. For sugars between 50 and 200 IU, the absolute difference between two results obtained under repeatability conditions should not be greater than 9 IU and under reproducibility conditions not greater than 22 IU. For sugars between 200 and 600 IU, the absolute difference between two results obtained under repeatability conditions should not be greater than 44 IU and under reproducibility conditions not greater than 109 IU.

Online Access to ICUMSA Method GS2-9 (2024)

Access to the online Version of ICUMSA Method GS2-9 (2024) can be obtained from the Sugar Industry Website, operated by Bartens. The online access for two years costs EUR35 (+ 7 % VAT for German and EU citizens without EU VAT No.).