International Sugar Journal
The Blackboard

“True” Sucrose [Registered]

The use of pol as an estimate of sucrose has been, and still is, one of the most useful practices in the sugar industry. Its limitations were however well known; Brown and Zerban (1948) state that in 1842 the French scientist J B Biot proposed an inversion method to determine sucrose in the presence of other optically active substances. In 1846 one of his students, T Clerget, devised a double polarisation method specifically for cane products where fructose (F) and glucose (G) are present. The Clerget method, which is still used today, has been the subject of considerable investigation. The…

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