A Novel Approach for Determination of Free Fatty Acids in Vegetable Oils by a Flow Injection System with Manual Injection

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dc.contributor.authorAyyildiz, H. Filiz
dc.contributor.authorKara, Huseyin
dc.contributor.authorSherazi, S. T. H.
dc.date.accessioned2020-03-26T18:13:41Z
dc.date.available2020-03-26T18:13:41Z
dc.date.issued2011
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractA non-aqueous flow injection method for determining free fatty acid (FFA) content in corn and sunflower oil samples was developed. A single-line manifold system was built by modification of an HPLC for flow injection analysis (FIA). Without pre-treatment, oil samples were injected into a n-propanol solution containing KOH and phenolphthalein (PHP). The main parameters, such as flow rate of carrier phase, length, geometry, inner diameters of the coils and reagent concentration were all optimized. The proposed FIA method was validated for precision, accuracy, linear region, limit of detection (LOD) and limit of quantification (LOQ). The intra- and inter-day measurements of the precision of the method were found to be within the limits of acceptance criteria (RSD < 1%), and were rugged when the method was performed by a different analyst. The linear concentration range was calculated as 0.09-1.50 and 0.07-1.40 FFA% for corn and sunflower oils, correspondingly. The LOD and LOQ were found to be 7.53 x 10(-4)-2.28 x 10(-3) oleic acid % and 7.11 x 10(-4)-2.23 x 10(-3) oleic acid % for corn and sunflower oils, respectively. The results were compared with those obtained by the AOCS (Ca-5a-40) method using statistical t and F tests, and a significant difference was not observed between the methods at a 95% confidence level. The proposed method is suitable for quality control of routine applications due to its simplicity, high sample throughput, and economy of solvents and sample, offering considerable promise as a low cost analytical system that needs minimum human intervention over long periods of time.en_US
dc.description.sponsorshipSelcuk UniversitySelcuk University [SU-BAP 08-101029]en_US
dc.description.sponsorshipThis study, a part of Ph.D. thesis entitled "Improvement of Edible Oil Analysis Methods by Flow Injection Systems" was supported by Selcuk University Coordination of Scientific Research with SU-BAP 08-101029 project numbers. The authors wish to thank the Principal of Selcuk University and Scientific Research Projects Coordination.en_US
dc.identifier.doi10.1007/s11745-011-3610-9en_US
dc.identifier.endpage1190en_US
dc.identifier.issn0024-4201en_US
dc.identifier.issn1558-9307en_US
dc.identifier.issue12en_US
dc.identifier.pmid21904794en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage1181en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s11745-011-3610-9
dc.identifier.urihttps://hdl.handle.net/20.500.12395/26068
dc.identifier.volume46en_US
dc.identifier.wosWOS:000297129500010en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherWILEYen_US
dc.relation.ispartofLIPIDSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectFlow injection analysis (FIA)en_US
dc.subjectVegetable oilsen_US
dc.subjectFree fatty acid (FFA)en_US
dc.subjectDirect analysisen_US
dc.subjectCorn oilen_US
dc.subjectSunflower oilen_US
dc.titleA Novel Approach for Determination of Free Fatty Acids in Vegetable Oils by a Flow Injection System with Manual Injectionen_US
dc.typeArticleen_US

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