A modified method for determining free fatty acids from small soybean oil sample sizes

  title={A modified method for determining free fatty acids from small soybean oil sample sizes},
  author={Ibni Hajar Rukunudin and Pamela J. White and Carl J. Bern and Theodore B. Bailey},
  journal={Journal of the American Oil Chemists' Society},
A modification of the AOCS Official Method Ca 5a-40 for determination of free fatty acids (FFA) in 0.3 to 6.0-g samples of refined and crude soybean oil is described. The modified method uses only about 10% of the weight of oil sample, alcohol volume, and alkali strength recommended in the Official Method. Standard solutions of refined and crude soybean oil with FFA concentrations between 0.01 and 75% were prepared by adding known weights of oleic acid. The FFA concentrations, determined from… Expand

Figures and Tables from this paper

Rapid Determination of Free Fatty Acid in Extra Virgin Olive Oil by Raman Spectroscopy and Multivariate Analysis
We introduce a visible Raman spectroscopic method for determining the free fatty acid (FFA) content of extra virgin olive oil with the aid of multivariate analysis. Oleic acid was used to increaseExpand
Rapid Determination of Degradation in Frying Oils with Near-Infrared Spectroscopy
Measures of free fatty acids (FFA), total polar materials (TPM), and conjugated dienoic acids (CDA), typical indices of oil degradation, were analyzed in daily oil aliquots taken from soybean oilsExpand
A Visual Titration Method for the Determination of the Acid Number of Oils and Fats: a Green Alternative
A visual and green titrimetric method is proposed for the determination of the acid number of oils and fats. The sample is dissolved in a water–ethanol mixture (1:1 v/v) and titrated with a 0.02 molExpand
Tropical Oil Blending and Their Effects on Nutritional Content and Physicochemical Properties during Deep Fat Frying.
The oil blended at a ratio of 30 : 30 : 40 shows the greatest performance as a deep frying media compared to the other blended oils that were tested. Expand
Characteristics of Oil and Skim in Enzyme-Assisted Aqueous Extraction of Soybeans
The economic viability of enzyme-assisted aqueous extraction processing (EAEP) of soybeans depends on properties and potential applications of all fractions (skim and insolubles as well as oil). EAEPExpand
Frying Performance of No-trans, Low-Linolenic Acid Soybean Oils
Two extruded-expelled physically refined soybean oils with reduced contents of linolenic acid, ultra-low- linolenic acid (ULL, 1.5%) and low-linolenic acid (LL, 2.6%), and a extruded-expelledExpand
Effect of Subcritical Carbon Dioxide Extraction and Bran Stabilization Methods on Rice Bran Oil
The extraction of rice bran oil using the conventional organic solvent-based Soxhlet method involves hazardous chemicals, whereas supercritical fluid extraction is a costly high-temperature operatingExpand
Statistical analysis and optimization of biodiesel production from waste coffee grounds by a two-step process
  • Y. Go, S. Yeom
  • Chemistry
  • Biotechnology and Bioprocess Engineering
  • 2017
Biodiesel was produced using waste coffee grounds (WCGs) via a two-step process comprising lipid extraction and subsequent transesterification steps. Each step was statistically analyzed, and optimumExpand
Effect of frying time on free fatty acid generation and esterification rate in Aspergillus sp.-catalyzed transesterification of cottonseed oil
Abstract The present study was carried out to examine the effect of different frying times of edible oil on the extent of transesterification catalyzed by the whole-cell biocatalyst, AspergillusExpand
Optimization of a two-step biodiesel production process comprised of lipid extraction from blended sewage sludge and subsequent lipid transesterification
As a preliminary research for the development of feasible and economical biodiesel production using blended sewage sludge (BSS), a sustainable and non-edible feedstock, the two-step process comprisedExpand


FTIR estimation of free fatty acid content in crude oils extracted from damaged soybeans
A user-interactive computer-assisted Fourier transform infrared (FTIR) method has been developed for estimation of free fatty acids (FFA) in vegetable oil samples by deconvolution of the infraredExpand
Effects of processing on quality of soybean oil
The fate of major and minor components of soybean oil is examined at each stage of processing. Relationships are then drawn upon the effect on the quality of finished oil. General topics covered areExpand
Automated free fatty acid determination using flow injection analysis solvent extractions
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 separatorExpand
Mounts, FTIR Estimation of Free Fatty Acid Content in Crude Oil Extracted from Damaged Soybeans
  • J. Am. Oil Chem. Soc
  • 1991
Refining and Bleaching, in Bailey’s Industrial Oil and Fat Products, 4th edn., edited by D
  • 1982