Química Nova (Jan 2013)

Cor ASTM: um método simples e rápido para determinar a qualidade do biodiesel produzido a partir de óleos residuais de fritura

  • Verônica Santos de Morais,
  • Eustáquio Vinícius Ribeiro de Castro,
  • Maria Tereza Weitzel Dias Carneiro,
  • Geisamanda Pedrini Brandão,
  • Reginaldo Fabri Júnior,
  • Denise Rocco de Sena

DOI
https://doi.org/10.1590/S0100-40422013000400018
Journal volume & issue
Vol. 36, no. 4
pp. 587 – 592

Abstract

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In this study, 23 biodiesel samples were produced, 20 from used cooking oil and the remaining 3 from refined soybean oil. The following properties were determined in all of the samples (oil and its respective biodiesel): density; viscosity; total acid number and ASTM color. The results indicated high correlation (R > 0.6) between ASTM color of used cooking oil and total acid number of its resultant biodiesel. This high correlation allows prediction of the quality of the biodiesel produced using a simple and fast procedure such as ASTM color.

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