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dc.contributor.authorAltunay N.
dc.contributor.authorGürkan R.
dc.contributor.authorSertakan K.
dc.date.accessioned2019-07-27T12:10:23Z
dc.date.accessioned2019-07-28T09:31:45Z
dc.date.available2019-07-27T12:10:23Z
dc.date.available2019-07-28T09:31:45Z
dc.date.issued2015
dc.identifier.issn1936-9751
dc.identifier.urihttps://dx.doi.org/10.1007/s12161-015-0094-x
dc.identifier.urihttps://hdl.handle.net/20.500.12418/5338
dc.descriptionSpringer New York LLCen_US
dc.description.abstractA new indirect ultrasonic-assisted cloud point extraction (UA-CPE) method has been developed for the determination of trace sulfite species by means of spectrophotometry. The method is based on either directly imide–bisulfite adducts formation or ion-pairing complexation of enolate–bisulfite adducts produced by the oxidation of pyrogallol with sulfite at pH 10 with 3-amino-7-diethylamino-8,9-benzo-2-phenoxazine chloride (Nile blue A) and CPE of ion-pairing complex formed from aqueous solution using Triton X-114. Under the optimized conditions, the calibration graphs with and without bromide were highly linear in the ranges of 6–180 and 7.5–180 ?g L?1 with changing sensitivity. The limits of detection and quantification (LOD and LOQ) (3?<inf>blank</inf>/m and 10?<inf>blank</inf>/m) with bromide was 1.75 and 5.83 ?g L?1 (n = 6) and the precision, the relative standard deviations (RSDs), for determination of 25, 75, and 150 ?g L?1 of sulfite was in range of 2.40–5.20 % (n = 10). The method showed good selectivity, and was successfully applied to the speciative determination of trace sulfite in selected beverages with and without alcohol. The results were compared with those of the standard 5,5?-dithio-bis(2-nitrobenzoic acid (DTNB) method, and the two paired t test was used to determine whether the results obtained by the two methods differ significantly. © 2015, Springer Science+Business Media New York.en_US
dc.description.sponsorshipAltunay, N.; Faculty of Science, Department of Chemistry, University of CumhuriyetTurkeyen_US
dc.language.isoengen_US
dc.relation.isversionof10.1007/s12161-015-0094-xen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBeverage samplesen_US
dc.subjectNile blue Aen_US
dc.subjectPyrogallolen_US
dc.subjectSpectrophotometryen_US
dc.subjectSulfiteen_US
dc.subjectUltrasonic-assisted cloud point extractionen_US
dc.titleIndirect Determination of Free, Total, and Reversibly Bound Sulfite in Selected Beverages by Spectrophotometry Using Ultrasonic-Assisted Cloud Point Extraction as a Preconcentration Stepen_US
dc.typearticleen_US
dc.relation.journalFood Analytical Methodsen_US
dc.contributor.departmentAltunay, N., Faculty of Science, Department of Chemistry, University of Cumhuriyet, Sivas, 58140, Turkey -- Gürkan, R., Faculty of Science, Department of Chemistry, University of Cumhuriyet, Sivas, 58140, Turkey -- Sertakan, K., Faculty of Science, Department of Chemistry, University of Cumhuriyet, Sivas, 58140, Turkeyen_US
dc.identifier.volume8en_US
dc.identifier.issue8en_US
dc.identifier.endpage2106en_US
dc.identifier.startpage2094en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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