ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 3 December 2009
Page Count: 8

A Simple Green Method for Biodiesel Iodine Number Determination

Aricetti, Juliana Aparecida
Institute of Chemistry, Univ. of Campinas, Campinas, UNICAMPSP

Maciel, Antonio José da Silva
Agricultural Engineering Faculty, Univ. of Campinas, Campinas, UNICAMPSP

Lopes, Osvaldo Cândido
Agricultural Engineering Faculty, Univ. of Campinas, Campinas, UNICAMPSP

Tubino, Matthieu
Institute of Chemistry, Univ. of Campinas, Campinas, UNICAMPSP

(Received 14 May 2009; accepted 13 October 2009)

Abstract

A simple and green method for the determination of the iodine number in biodiesel is proposed based on the Friedmann procedure for oils and fats adapted for biodiesel. The reagent solutions used are prepared in water with the exception of the standard iodine and the biodiesel solutions that are dissolved in ethanol 96 %. The method was compared with the procedure recommended by the norm EN 14111, which is essentially the Wijs method. Biodiesel derived from several oils and fats were analyzed using the two methods. A statistical comparison between them shows that both offer equivalent results and precision.

Keywords:
iodine value, iodine index, iodine number, titration, biodiesel, green method, EN 14111, Wijs

Paper ID: JAI102516
DOI: 10.1520/JAI102516
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