The method measures the reducing power of solutions of white sugar containing reducing substances e. g. invert sugar in a weak alkaline solution of a Cu++ complex with tartrate. It is suitable for white sugar and plantation white sugar containing up to 0.089 g/100 g of reducing sugars. The method has Official Status but, if a choice is available, ICUMSA® recommends that Method GS2-5 is used preferentially. For white sugars and plantation white sugars containing between 0.007 g/100 g and 0.089 g/100 g reducing sugars, the absolute difference between two results obtained under repeatability conditions should not be greater than 0.006 g/100 g and under reproducibility conditions not greater than 0.011 g/100 g.
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Please click here to open ICUMSA Method GS2/9-6 (2011).