@misc{10481/32481,
year = {2004},
url = {http://hdl.handle.net/10481/32481},
abstract = {A 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.},
organization = {Financial support from the Ministerio de Educación y Cultura, Dirección General de Enseñanza Superior (Spain), project n. BQU2002-00353.},
publisher = {Japan Society for Analytical Chemistry (JSAC)},
keywords = {Chromatography mass-spectrometry},
keywords = {Capillary electrophoresis},
keywords = {Artificial sweeteners},
keywords = {Amino acids},
keywords = {Soft drinks},
keywords = {Ninhydrin},
keywords = {Electrode},
keywords = {Reagent},
title = {Flow-through spectrophotometric sensor for the determination of aspartame in low-calorie and dietary products},
author = {Capitán Vallvey, Luis Fermín and Valencia Mirón, María del Carmen and Arana Nicolás, Evaristo de},
}