Use of FT-NIR spectroscopy for determination of free fatty acid in the rapeseed oil Zastosowanie spektroskopii FT-NIR do ilościowego oznaczania wolnych kwasów tłuszczowych w oleju rzepakowym

2016 ◽  
Vol 1 (4) ◽  
pp. 77-80
Author(s):  
Izabela Semeniuk
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Rapeseed Oil ◽  
Nir Spectroscopy

Validation of a new method for determination of free fatty acid turnover

1987 ◽  
Vol 252 (3) ◽  
pp. E431-E438 ◽  
Author(s):  
J. M. Miles ◽  
M. G. Ellman ◽  
K. L. McClean ◽  
M. D. Jensen
Keyword(s):  
Steady State ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Clearance Rate ◽  
Experimental Period ◽  
Metabolic Clearance ◽  
Metabolic Clearance Rate ◽  
State Equations ◽  
Tracer Methods

The accuracy of tracer methods for estimating free fatty acid (FFA) rate of appearance (Ra), either under steady-state conditions or under non-steady-state conditions, has not been previously investigated. In the present study, endogenous lipolysis (traced with 14C palmitate) was suppressed in six mongrel dogs with a high-carbohydrate meal 10 h before the experiment, together with infusions of glucose, propranolol, and nicotinic acid during the experimental period. Both steady-state and non-steady-state equations were used to determine oleate Ra ([3H]oleate) before, during, and after a stepwise infusion of an oleic acid emulsion. Palmitate Ra did not change during the experiment. Steady-state equations gave the best estimates of oleate inflow approximately 93% of the known oleate infusion rate overall, while errors in tracer estimates of inflow were obtained when non-steady-state equations were used. The metabolic clearance rate of oleate was inversely related to plasma concentration (P less than 0.01). In conclusion, accurate estimates of FFA inflow were obtained when steady-state equations were used, even under conditions of abrupt and recent changes in Ra. Non-steady-state equations, in contrast, may provide erroneous estimates of inflow. The decrease in metabolic clearance rate during exogenous infusion of oleate suggests that FFA transport may follow second-order kinetics.

Concerns for the determination of free fatty acid in cottonseed

1998 ◽  
Vol 75 (10) ◽  
pp. 1321-1324 ◽  
Author(s):  
P. J. Wan ◽  
D. R. Pakarinen ◽  
P. J. Wakelyn
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid

Determination of the iodine value and the free fatty acid content of waste animal fat blends using FT-NIR

2014 ◽  
Vol 72 ◽  
pp. 72-78 ◽  
Author(s):  
Peter Adewale ◽  
Ogan Mba ◽  
Marie-Josée Dumont ◽  
Michael Ngadi ◽  
Robert Cocciardi
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Iodine Value ◽  
Free Fatty Acid Content ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Animal Fat

Integrated procedure for the determination of free fatty acid, glycerol, triacylglycerol and prostaglandins in rat epididymal fat pads

Biochimie ◽  
1977 ◽  
Vol 58 (11-12) ◽  
pp. 1413-1415 ◽  
Author(s):  
Christiane Godard ◽  
Bernard Lambert ◽  
Claude Jacquemin
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Epididymal Fat ◽  
Fat Pads

Validation of the Free Fatty Acid Test Kit for the Measurement of the Free Fatty Acid Content of Vegetable Oils, Fish Oils, Animal Fats (Tallows), Meat and Fish Meals, and Potato Chips and Grain-Based Snack Products: AOAC Performance Tested MethodSM 052004

2020 ◽  
Author(s):  
Virginia C Gordon I ◽  
Christopher C Rainey ◽  
Willainia C Studmire
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Fatty Acid Content ◽  
Animal Fats ◽  
Independent Laboratory ◽  
Test Kit ◽  
Acid Test ◽  
Snack Products

Abstract Background The Official American Oil Chemists’ Society (AOCS) Ca 5a-40 method for the determination of free fatty acids is based on titration of an ethanolic solution and requires a large volume of organic solvents, large sample aliquots, and up to 18 hours extraction time for some samples. The SafTest Free Fatty Acid Test Kit is a rapid method designed to measure the free fatty acid content of vegetable oils; fish oil; animal fats (tallows); meat meal and fish meal products; and crackers, chips, and other processed grain-based snack products using micro-analytical and membrane separation principles. Objective The study objective was to validate the SafTest Free Fatty Acid Test in one internal study, two contracted studies, and an independent laboratory study studies. Method Recovery, limit of quantitation, selectivity, robustness, stability, and consistency of the SafTest Free Fatty Acid Test were evaluated. Results Recoveries from control solutions ranged from 97 to 106%. Repeatability (RSDr) from method developer matrix studies ranged from 1.1 to 8.1%. Biases, expressed as a percentage recovery from AOCS Ca 5a-40, averaged 96.5% for olive oils, 94.0% for animal fats, and 103.9% for meat meals. Results observed in the independent laboratory study were similar. Conclusions The SafTest Free Fatty Acid Test can measure free fatty acid levels in oils, fats, meal, and snack matrices with accuracy and precision comparable to AOCS Ca 5a-40. Highlights The SafTest Free Fatty Acid Test Kit has the advantage of using reagent volumes, instrumental analysis, and easy-to-use, standardized procedures with rapid detection times for the determination of free fatty acids.

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