Automated free fatty acid determination using flow injection analysis solvent extractions | Zendy

Canham John S. | Zendy; Pacey Gilbert E. | Zendy

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Automated free fatty acid determination using flow injection analysis solvent extractions

Author(s) -

Canham John S.,

Pacey Gilbert E.

Publication year - 1987

Publication title -

journal of the american oil chemists' society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.512

H-Index - 117

eISSN - 1558-9331

pISSN - 0003-021X

DOI - 10.1007/bf02542438

Subject(s) - absorbance , reagent , chemistry , chromatography , separator (oil production) , stearic acid , solvent , microporous material , oleic acid , flow injection analysis , fatty acid , organic chemistry , detection limit , biochemistry , physics , thermodynamics

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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