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vol. 11, nr. 1 (2008)
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Application of NIR spectroscopy for the analysis of water-carbohydrate interactions in water solutions
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Sławomir Bakier
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Food Industry Engineering, Bialystok University of Technology, ul. Wiejska 45C, 15-351 Białystok |
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vol. 11 (2008), nr. 1,
pp. 7-21
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abstract:
The paper shows how NIR spectroscopy can be used to describe water-glucose and water-fructose interactions that occur in water solutions. Using the technique of spectra subtraction, it was possible to identify isosbestic points that were assigned for glucose and fructose in water solutions by NIR spectra. Average values of the points with their standard deviations were calculated. A detailed analysis of the difference spectra made it possible to determine an additional absorbance extreme of glucose at = 4303 cm-1 which has not been, as yet, described in the world literature on the subject. The paper also compares water bonding forces of both glucose and fructose and relates the results to the measurements of water activity. Finally, the results obtained by the author are compared with the ones available in the literature.
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keywords:
Near-infrared spectroscopy, fructose, glucose, carbohydrate solutions, water activity, water properties
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original in:
English
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