The method is based upon a colorimetric procedure and is suitable for white and raw sugar, as well as low-grade products with lead contents not exceeding 0.5 mg Pb/kg. A dry ashing step for raw sugar and wet ashing for low-grade products is first required to eliminate organic matter. However, this pre-treatment is not necessary for white sugar.
Access to the online Version of ICUMSA Method GS2/1/3-27 (1994) 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.).