Authors:
Helena Halttunen Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä

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J. Nurmi Finnsugar Development, FIN-02460 Kantvik, Finland

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P. Perkkalainen Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä

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I. Pitkänen Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä

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S. Räisänen Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä

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Abstract  

The purpose of this study is to find out the effect of the crystal water content on the crystal structure of lactitol monohydrate. Crystal water was removed by drying over silicagel at 40°C and by using phosphorus pentoxide as drying agent at 20°C. The amouts of water removals were identified by thermogravimetry, the melting points and the heat of fusions were calculated from the results of differential scanning calorimetry measurements and the structure of samples were identified by X-ray powder diffraction method. Over 23 w/w% of total water content could removed by gently drying until significant structural changes could be detected. The melting point of anhydrous lactitol obtained by drying lactitol monohydrate was 120°C and the melting enthalpy was 102 J g−1 when measured with heating rate 10°C min−1 by DSC.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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