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Neltec Real-Time Colour |
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White Sugar Colour in Solution - Comparative Study
Authors Laurent Bienaimé, Union SDA, Origny, France. Bjarne Chr. Nielsen, Neltec.
Presented at The C.I.T.S 21st General Assembly in Antwerp, 1999.
Abstract Two different methods for determining white sugar colour in solution values have been compared at the Union SDA factory at Origny. The first was the standard laboratory procedure and the second was an inline method using the Neltec ColourQ 800 colorimeter to measure directly reflectance from crystalline sugar on a conveyor. Results from the laboratory determinations were used to calibrate the in-line method, and for more than a full campaign the factory has sampled the sugar produced and compared the two methods.
Measurements taken over two campaigns have proven the in-line instrument to be robust and accurate, fully capable of operating in industrial conditions, and achieving very precise readings, with SEP values as low as 0.8 IU over extended periods. After extensive tests, the instrument was connected to the conveyor controls, and it now automatically switches sugar between two silos, to separate low and high colour sugar. |
