Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/3259
Título: Automatic method for the determination of folin−ciocalteu reducing capacity in food products
Autor: Magalhães, Luís M.
Segundo, Marcela A.
Reis, Salette
Lima, José L. F. C.
Rangel, António O. S. S.
Palavras-chave: Multi-syringe flow injection
Folin-Ciocalteu reducing capacity
Phenolic compounds
Data: 2006
Editora: American Chemical Society
Citação: MAGALHÃES, 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. 5241-5246
Resumo: In 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).
URI: http://hdl.handle.net/10400.14/3259
Versão do Editor: http://pubs.acs.org/doi/abs/10.1021/jf060324s
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Automatic method for the determination....pdf68,32 kBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.