Description
The ICUMSA Methods Book Supplement 2026 comprises 2 new Methods, 1 revised Standard, 1 Method changed in Status, 2 Methods changed in Field of Application, and 6 completely revised Methods.
Introductory Pages
The new introductory pages 1–14 of the Methods Book should replace the 2024 version.
New Method
GS1-25 (2026) Particle Size Distribution of Raw Sugar by Sieving – Tentative
GS4-23 (2026) Polarimetric Sucrose Content of Molasses with Correction for Invert Sugar Content by Polarimetry and Clarification using Carrez Solutions – Tentative
Method changed in Status from Official to Accepted
GS2-45 (2026) Slime-forming Bacteria in White Sugar by Membrane Filtration or Pour Plating – Accepted
Methods changed in Field of Application
GS2-33 (2026) Spectrophotometric Sulphite Content in White Sugar and Plantation White Sugar using Rosaniline Hydrochloride – Official (Reference)
GS4-2 (2026) Sucrose in Molasses by Gas Chromatography–Official
Revised Methods
GS2-13 (2026) Reflectance of White Sugar – Official
GS2-19 (2026) Insoluble Matter in White Sugar by Membrane Filtration – Official
GS2-50 (2026) Thermophilic Acidophilic Bacteria (TAB) and Guaiacol Producing TAB (GP-TAB) in White Sugar by Membrane Filtration or Enrichment – Accepted
GS4-1 (2026) Polarimetric Sucrose Content of Molasses with Correction for Invert Sugar Content by Polarimetry and Clarification using Basic Lead Acetate – Accepted
GS8-19 (2026) Dextran by Spectrometry using a Modified Alcohol Haze Method
– in Beet Raw Juice – Accepted
– in Beet Thick Juice – Tentative
GS9-8 (2026) Colour in Solution of Sugars with more than 10 and less than 16,000 ICUMSA® Units and pH Adjustment with MOPS Buffer – Official (Reference)
Revised Specifications and Standards
SPS-1 (2026) Polarimetry and the International Sugar Scale – Official
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