The method measures the reducing power of solutions of white sugar containing reducing substances eg. invert sugar in a weak alkaline solution of a Cu++ complex with tartrate [1,2,3,4,5,6].
Access to the online Version of ICUMSA Method GS2/9-6 (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.).