Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/3259
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dc.contributor.authorMagalhães, Luís M.-
dc.contributor.authorSegundo, Marcela A.-
dc.contributor.authorReis, Salette-
dc.contributor.authorLima, José L. F. C.-
dc.contributor.authorRangel, António O. S. S.-
dc.identifier.citationMAGALHÃES, Luís M ...[at al.] - Automatic method for the determination of folin−ciocalteu reducing capacity in food products. Journal of Agricultural and Food Chemistry. ISSN 0021-8561. Vol. 54, n. 15 (2006), p. 5241-5246por
dc.description.abstractIn the present work, an automatic flow procedure based on multi-syringe flow injection analysis was developed for the assessment of Folin-Ciocalteu reagent (FCR) reducing capacity in several types of food products using gallic acid as the standard. Different strategies for mixing of sample and reagent were tested (continuous flow of FCR, merging zones, and intercalated zones approaches); lower reagent consumption and higher determination throughput were attained for the merging zones approach (100 íL of sample + 100 íL of FCR). The application of the proposed method to compounds with known antioxidant activity (both phenolic and nonphenolic) and to samples (wines, beers, teas, soft drinks, and fruit juices) provided results similar to those obtained by the conventional batch method. The detection limit was 0.6 mg L-1, and the determination frequency was about 12 h-1. Good repeatability was attained (RSD < 1.3%, n ) 10).por
dc.publisherAmerican Chemical Societypor
dc.subjectMulti-syringe flow injectionpor
dc.subjectFolin-Ciocalteu reducing capacitypor
dc.subjectPhenolic compoundspor
dc.titleAutomatic method for the determination of folin−ciocalteu reducing capacity in food productspor
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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