Sulphite in White Sugar by the Rosaniline Colorimetric Method – Official (Reference)

35.00  for 2 years

ICUMSA Method GS2-33 (2022)

online version (2 years license)

Year of Publication: 2022


This method is used to determine the sulphite concentration in white sugar.

The colour of a sulphite/rosaniline complex formed is measured at 560 nm and compared to a standard curve previously prepared.

The method has Official (Reference) Status for white sugar.

The absolute difference between two results obtained under repeatability conditions for white sugars between 4.2 mg/kg and 27.63 mg/kg sulphite should be in the range of 0.72 mg/kg to 5.6 mg/kg and under reproducibility conditions in the range of 1.56 mg/kg to 24.19 mg/kg.

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Method Abstract


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Additional information


ICUMSA Method GS2-33 (2022)


online version (2 years license)