International Sugar Journal

Development of a lead-free pre-treatment method to determine the polarization of raw sugar [Full subscriber]

Increased environmental and health concern about lead compounds is making it difficult to purchase basic lead acetate and will not therefore allow analysts to use the current ICUMSA method GS1/2/3-1 for much longer. In order to seek an environment-friendly alternative, we compared the existing method with a possible replacement which is lead-free, including the transition to a tentative ICUMSA method GS1/2/3-2 (Near Infra-Red polarimetirc method). Sixteen non-lead chemical compounds and one lead-free deproteinizing agent (a combination of a zinc sulfate solution and a barium hydroxide solution) were tested for clarifying raw cane sugars from Australia, Thailand and Philippine for polarization…

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