Ilustração da influência da razão de aquecimento nos resultados de termogravimetria

The effects of the heating rate on a TG curve of a sample have been widely discussed in the literature. This paper shows the influence of heating rate (beta) in thermogravimetry results when stoichiometry determinations are studied. For this purpose the compound Sm(CH3SO3)3.2(3-picNO) was considered...

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Bibliographic Details
Published inQuímica nova Vol. 23; no. 1; pp. 113 - 115
Main Authors Matos, Jivaldo do Rosário, Miyano, Miriam Hisami, Siqueira, Lilian, Moura, Maria de Fátima Vitória de, Luiz, José Marques
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 01.02.2000
Subjects
heating rate
stoichiometry determination
thermogravimetry
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Summary:The effects of the heating rate on a TG curve of a sample have been widely discussed in the literature. This paper shows the influence of heating rate (beta) in thermogravimetry results when stoichiometry determinations are studied. For this purpose the compound Sm(CH3SO3)3.2(3-picNO) was considered beta of 2,5; 5; 10; 20 and 40degreesC min-1 in dynamic air atmosphere were obtained. The results are in agreement with proposed stoichiometry for beta equal to 2,5 and 5degreesC min-1. However, using a higher beta the same results were not obtained resulting in false stoichiometry determinations.
ISSN:0100-4042
1678-7064
DOI:10.1590/S0100-40422000000100020