Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 40: Issue 2
Precise determination of low level sucrose amorphism by microcalorimetry
Authors:
A. Raemy Nestle Research Centre, Nestec Ltd, Vers-Chez-Les-Blanc, P.O. Box 44, CH-1000 Lausanne 26, Switzerland

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C. Kaabi Nestle Research Centre, Nestec Ltd, Vers-Chez-Les-Blanc, P.O. Box 44, CH-1000 Lausanne 26, Switzerland

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E. Ernst Nestle Research Centre, Nestec Ltd, Vers-Chez-Les-Blanc, P.O. Box 44, CH-1000 Lausanne 26, Switzerland

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G. Vuataz Nestle Research Centre, Nestec Ltd, Vers-Chez-Les-Blanc, P.O. Box 44, CH-1000 Lausanne 26, Switzerland

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Pages:
437–444
Online Publication Date:
09 Jan 2007
Publication Date:
01 Jun 1993
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02546612
Keywords:
sucrose; carbohydrate; amorphism; crystallinity
Restricted access

Abstract  

The DSC curve of freeze-dried amorphous sucrose shows the glass transition, the crystallization and the melting (just before decomposition) of the sample. Sucrose crystallization occurs below 100°C: this phenomenon can therefore be observed with the microcalorimeter Setaram Micro-DSC used in the scanning mode. Mixtures of amorphous and crystalline sucrose in known proportions were used to calibrate the instrument. Low level amorphism (down to about 0.5%) could be detected and quantitatively evaluated on the basis of the crystallization enthalpies determined. The calibration curve obtained can be applied to determine the degree of amorphism in milled sucrose. A simple gravimetric method, based on the desorption of water induced by recrystallization of the amorphous layer can be used to obtain similar data more rapidly. This simple method is particularly useful for controlling the amorphism on line during a process, and is also briefly described.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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