Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 49: Issue 2
Comparative studies on some analytical methods
Thermal decomposition of powder milk
Authors:
R. Macêdo Departamento de Química/CCEN/UFPB, Campus I, CEP 58059-900 João Pessoa, Paraíba, Brazil

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O. de Moura Departamento de Química/CCEN/UFPB, Campus I, CEP 58059-900 João Pessoa, Paraíba, Brazil

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A. de Souza Departamento de Química/CCEN/UFPB, Campus I, CEP 58059-900 João Pessoa, Paraíba, Brazil

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A. Macêdo Departamento de Química/CCEN/UFPB, Campus I, CEP 58059-900 João Pessoa, Paraíba, Brazil

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Pages:
857–862
Online Publication Date:
05 Aug 2005
Publication Date:
01 Aug 1997
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01996770
Keywords:
analytical methods; kinetics; powder milk; temperature
Restricted access

Abstract  

This work present comparative results on powder milk storage quality, obtained from analytical methods. Protein content was determined conventional (Kjeldahl) and colorimetric with biuret reagent at 540 nm and integral quality by thermogravimetric and biological methods. A method was developed for the protein separation of powder milk. Powder milk was submitted to degradation processes at 45, 60 and 80°C for 20 days. The results indicated that protein content values were inconsistent if determinations by Kjeldahl and colorimetric methods and biological tests were compared. There is evidence of thermal decomposition of powder milk as detected by biological and thermogravimetric methods.

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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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