INQUISUR   21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
artículos
Título:
FLOW-INJECTION SPECTROPHOTOMETRIC METHOD WITH ON-LINE PHOTODEGRADATION FOR DETERMINATION OF ASCORBIC ACID AND TOTAL SUGARS IN FRUIT JUICES
Autor/es:
LLAMAS; DI NEZIO; FERNANDEZ BAND
Revista:
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 24 p. 127 - 130
ISSN:
0889-1575
Resumen:
This article reports a flow-injection spectrophotometric determination (FIA) with a photodegradation step to determine ascorbic acid and total sugars. The flow-injection system includes a simple ultraviolet photoreactor for the on-line photodegradation. The method is based on the determination of ascorbic acid at 300 nm before the photodegradation step, followed by UV irradiation and measurement of total sugars at 268 nm. The proposed method was used to determine ascorbic acid and total sugars in commercial and natural fruit juice samples. The method was validated by using spiked samples with recoveries in the range 96.4?108.3% for ascorbic acid, and 91.0?113.2% for total sugars.