BDPA - Bases de Dados da Pesquisa Agropecuária Embrapa
 






Registro Completo
Biblioteca(s):  Embrapa Mandioca e Fruticultura.
Data corrente:  22/03/1994
Data da última atualização:  22/03/1994
Autoria:  NAGY, S.; ROUSEFF, R. L.; FISHER, J. F.; LEE, H. S.
Afiliação:  Scientific Research Department, Florida Department of Citrus, and University of Florida, CREC, 700 Experiment Station Road, Lake Alfred, Florida 33850.
Título:  HPLC Separation and Spectral Characterization of Browning Pigments from White Grapefruit Juice Stored in Glass and Cans
Ano de publicação:  1992
Fonte/Imprenta:  Jornal of Agricultural and Food Chemistry, v.40, n.1, p.27, 1992
ISSN:  0021-8561
Idioma:  Inglês
Conteúdo:  A ternary solvent system consisting of water, acetonitrile, and tetrahydrofuran was used in HPLC to separate browning pigments formed in grapefruit juice stored in cans and bottles. Pigments were spectrophotometrically characterized using a photodiode array detector. HPLC runs evaluated at various storage times manifested different browning patterns with both the canned and bottled juices. Some compounds increased and then decayed with time, whereas others continued to intensify. Late eluting components (Rt > 80 min) were the most nonpolar browning pigments and, also, showed the most consistent HPLC patterns. HPLC patterns, retention times, and UV-vis spectra of browning components in canned juices were notably different from those of glass-packed juices.Most of the separated compounds exhibited absorbance maxima in the region 380-400 nm, and a value of390 nm was ascertained by averaging all visible-absorbing maximums. No browning pigment had a distinct absorbance above 400nm. The use of 390 nm to monitor nonenzymic browning of graperfruit juice is more appropriate than the current accepted value of 420 nm.
Palavras-Chave:  Citros.
Thesagro:  Suco; Tecnologia.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Mandioca e Fruticultura (CNPMF)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPMF2460 - 1ADDAP - --664-028605664-028605
Voltar
Nenhum registro encontrado para a expressão de busca informada.
Nenhum registro encontrado para a expressão de busca informada.
 
 

Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área Restrita

Embrapa Agricultura Digital
Av. André Tosello, 209 - Barão Geraldo
Caixa Postal 6041- 13083-886 - Campinas, SP
SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional