Potentiometric titration applied to free fatty acid determination of edible oils and fats

Química Nova

Ragazzi, Sidnei¹  Osawa, Cibele Cristina¹  Universidade Estadual de Campinas, Campinas, Brasil¹  Gonçalves, Lireny Ap. Guaraldo¹ 

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

DOI  :  10.1590/S0100-40422006000300031

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown