The membrane filter method of Hibbert and Phillipson [2], modified by using a lower temperature [3,4], is used to determine the amount of water-insoluble matter in white sugars. This method has Official status for such sugars [1].
Access to the online Version of ICUMSA Method GS2/3/9-19 (2007) 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.).