
handle: 10953.1/554
En este trabajo de fin de grado, se ha desarrollado un método para la determinación simultánea de varios edulcorantes (acesulfamo-K, sacarina, ciclamato, aspartamo y sucralosa) en bebidas empleando extracción en fase sólida (SPE) seguida de cromatografía líquida de alta resolución acoplada con espectrómetro de masas (HPLCMS) con un analizador de tiempo de vuelo (TOF) y una fuente de ionización de electrospray en modo negativo (ESI). Con el método SPE desarrollado, las recuperaciones obtenidas fueron próximas al 100% con valores de desviación estándar por debajo del 10% en la mayoría de los casos. Los límites de cuantificación (LOQ) para acesulfamo-K, sacarina, ciclamato, aspartamo y sucralosa fueron 2.37, 3.78, 3.47, <1 y 14.70 μg/L respectivamente. El método propuesto fue aplicado al estudio de 31 muestras de diferentes marcas de refrescos. El rango de concentración se encuentra entre 2,5 y 153,5 mg/L. En ningún caso se superan los valores especificados por las diferentes normativas aplicables.
In this work, a method for simultaneous determination of five sweeteners (acesulfame-K, saccharin, cyclamate, aspartame and sucralose) in soft drinks has been developed based on solid-phase extraction (SPE) followed by high performance liquid chromatography/mass spectrometry (HPLC-MS) using a time-of-flight analyzer (TOF) and a electrospray ionization source operated in the negative ion mode. With the proposed SPE sample treatment method, recovery rates obtained were close to 100% with RSD values below 10% for most of cases. Limits of quantification for acesulfame-K, saccharin, cyclamate, aspartame and sucralose were 2.37, 3.78, 3.47, <1 y 14.70μg/L respectively. The proposed method was applied to 31 samples of different brands of soft drinks. Range of concentration was between 2,5 and 153,5mg/L. All cases tested were in compliance with the established regulations.
Espectometría de masas, Chromatography, 2301, 2301.03, Química analítica, 2301.10, Mass Spectrometry, Análisis cromatográfico, Analitical chemistry
Espectometría de masas, Chromatography, 2301, 2301.03, Química analítica, 2301.10, Mass Spectrometry, Análisis cromatográfico, Analitical chemistry
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