Abstract: This method, which may form the basis of molasses purchasing contracts, measures the content of total reducing sugars, as glucose, after hydrolysis of sucrose in molasses samples.
The reducing sugars in the sample are heated with a copper (II) solution which is partially reduced to copper (I) - the excess copper (II) being determined iodometrically.
The absolute difference (for molasses samples containing around 50 g/100 g reducing sugars) between two results obtained under repeatability conditions should not be greater than 1.64 g/100 g and under reproducibility conditions should not be greater than 2.59 g/100 g.
Online Access to ICUMSA Method GS4/3-9 (2011)
Access to the online Version of ICUMSA Method GS4/3-9 (2011) can be obtained from the Sugar Industry Website, operated by Bartens. The online access for two years costs EUR35 (+ 19 % VAT for German and EU citizens without EU VAT No.).