Titulação potenciométrica aplicada na determinação de ácidos graxos livres de óleos e gorduras comestíveis

Química Nova

Cibele Cristina Osawa²  Lireny Ap. Guaraldo Gonçalves²  Sidnei Ragazzi¹ 

[1] ,Universidade Estadual de Campinas Faculdade de Engenharia de Alimentos Departamento de Tecnologia de AlimentosCampinas SP ,Brasil

关键词: free fatty acid determination;    potentiometric titration;    oil and fat quality;   

DOI  :  10.1590/S0100-40422006000300031

来源: SciELO

【 摘 要 】

Free fatty acids are a measure of evaluating fats and oils, submitted to abusive conditions, besides being a quality characteristic of edible vegetable oils. The official method of determination (AOCS Ca 5a-40, 2004) is based on titration, using phenolphthalein as an indicator. For crude and degummed oils, the titration end point is difficult to be observed due to the high level of pigments, resulting in dark solutions. In this case and others, such as self-life studies, in which sample quantities are limited, potentiometric titration may be a very good alternative.

【 授权许可】

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