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dc.contributor.authorCapitán Vallvey, Luis Fermín 
dc.contributor.authorValencia Mirón, María del Carmen
dc.contributor.authorArana Nicolás, Evaristo de
dc.date.accessioned2014-07-08T11:45:49Z
dc.date.available2014-07-08T11:45:49Z
dc.date.issued2004
dc.identifier.citationCapitán-Vallvey, L.F.; Valencia, M.C.; Arana Nicolás, E. Flow-through spectrophotometric sensor for the determination of aspartame in low-calorie and dietary products. Analytical Sciences, 20(10): 1437-1442 (2004). [http://hdl.handle.net/10481/32481]es_ES
dc.identifier.issn0910-6340
dc.identifier.urihttp://hdl.handle.net/10481/32481
dc.description.abstractA very simple flow-through sensor is presented for the determination of the intense sweetener aspartame in low-calorie and dietary products. The sensor is implemented in a monochannel flow-injection system with UV spectrophotometric detection using a Sephadex CM-C25 cationic exchanger packed 20 mm high in a flow cell. This method is based on the transient retention of a cationic species of the sweetener on the solid phase when a pH 5.0 acetic acid sodium acetate buffer (0.01 M) is used as a carrier (2.6 mL-1 min). The carrier itself elutes the analyte from the solid support, regenerating a sensing zone. Aspartame was determined by measuring its intrinsic absorbance at 219 nm at its residence time without any derivatization. Calibration graphs were linear over the range of 5.0 - 600.0 µg mL-1 with an RSD of 0.55% (peak height). This sweetener was determined in several samples by measuring the height or peak area, obtaining recoveries ranging between 95 - 101% and 97.5 - 101%, respectively. The procedure was validated for its use in the determination of aspartame in low-calorie and dietary products, giving reproducible and accurate results.es_ES
dc.description.sponsorshipFinancial support from the Ministerio de Educación y Cultura, Dirección General de Enseñanza Superior (Spain), project n. BQU2002-00353.es_ES
dc.language.isoenges_ES
dc.publisherJapan Society for Analytical Chemistry (JSAC)es_ES
dc.subjectChromatography mass-spectrometryes_ES
dc.subjectCapillary electrophoresises_ES
dc.subjectArtificial sweetenerses_ES
dc.subjectAmino acids es_ES
dc.subjectSoft drinks es_ES
dc.subjectNinhydrines_ES
dc.subjectElectrodees_ES
dc.subjectReagentes_ES
dc.titleFlow-through spectrophotometric sensor for the determination of aspartame in low-calorie and dietary productses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES


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