Vapor pressure data for fatty acids obtained using an adaptation of the DSC technique

Autor(es)

Matricarde Falleiro, Rafael M. ^[1] ; Akisawa Silva, Luciana Y. ^[2] ; Meirelles, Antonio J. A. ^[3] ; Kraehenbuehl, Maria A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, LPT, DPQ, Fac Engn Quim, BR-13083852 Campinas, SP - Brazil

^[2] Univ Fed Sao Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP - Brazil

^[3] Univ Estadual Campinas, EXTRAE, DEA, Fac Engn Alimentos, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Thermochimica Acta; v. 547, p. 6-12, NOV 10 2011.
• Citações Web of Science: 13

Resumo

The vapor pressure data for lauric (C-12:0), myristic (C-14:0), palmitic (C-16:0), stearic (C-18:0) and oleic (C-18:1) acids were obtained using Differential Scanning Calorimetry (DSC). The adjustments made in the experimental procedure included the use of a small sphere (tungsten carbide) placed over the pinhole of the crucible (diameter of 0.8 mm), making it possible to use a faster heating rate than that of the standard method and reducing the experimental time. The measurements were made in the pressure range from 1333 to 9333 Pa, using small sample quantities of fatty acids (3-5 mg) at a heating rate of 25K min(-1). The results showed the effectiveness of the technique under study, as evidenced by the low temperature deviations in relation to the data reported in the literature. The Antoine constants were fitted to the experimental data whose values are shown in Table 5. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 09/54137-1 - EMUS: aquisição de um analisador de distribuição de tamanho de partículas, um medidor de potencial zeta, um spray dryer e um sistema de cromatografia líquida de ultra alta pressão / espectrômetro de massa
• Beneficiário: Miriam Dupas Hubinger
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 08/08706-1 - Determinação Experimental de Dados de Equilíbrio Líquido-Vapor de Misturas Binárias de Ésteres Graxos Etílicos e Ácidos Graxos através da Calorimetria Diferencial Exploratória
• Beneficiário: Rafael Mauricio Matricarde Falleiro
• Modalidade de apoio: Bolsas no Brasil - Doutorado