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Automated free fatty acid determination using flow injection analysis solvent extractions

  • Technical
  • Published:
Journal of the American Oil Chemists’ Society

Abstract

A simplified, automated, colorimetric method is described for the determination of free fatty acids (FFA) in solution using solvent extraction flow injection analysis (SEFIA). A membrane separator utilizing a microporous Teflon membrane is used for a clean phase separation. A newly designed segmentor is used for segmenting the reagent and solvent streams. A linear relationship exists between normality and absorbance from 6×10−5 to greater than 3×10−2 N for oleic acid and from 4.4×10−5 to 6×10−3 N for stearic acid. The correlation between concentration and absorbance in this method is better than in previously advanced copper soap colorimetric methods. The sample throughput is 130 injections/hr.

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Authors and Affiliations

  1. Department of Chemistry, Miami University, 45056, Oxford, Ohio

    John S. Canham & Gilbert E. Pacey

Authors
  1. John S. Canham
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  2. Gilbert E. Pacey
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Cite this article

Canham, J.S., Pacey, G.E. Automated free fatty acid determination using flow injection analysis solvent extractions. J Am Oil Chem Soc 64, 1004–1007 (1987). https://doi.org/10.1007/BF02542438

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  • DOI: https://doi.org/10.1007/BF02542438

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