POLAROGRAPHIC DETERMINATION OF VITAMIN C AFTER DERIVATIZATION WITH o-PHENYLENEDIAMINE

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Jose Antonio Rodrigues (Autor) FCUP; Ines Maria Valente (Autor) Outra; Luis Moreira Goncalves (Autor) Outra; Joao Grosso Pacheco (Autor) Outra; Aquiles Araujo Barros (Autor) FCUP

Revista

Título: Collection of Czechoslovak Chemical Communications

Vol. 75 Nº 7

Páginas: 731-741

ISSN: 0010-0765

Editora: Akademie Ved Ceske Republiky

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 9 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências Físicas > Química > Análise instrumental ; Ciências Físicas > Química > Química aplicada

Outras Informações

ID Authenticus: P-003-AEK

DOI: 10.1135/cccc2010026

Abstract (EN): A differential pulse polarographic (DPP) method has been developed for the determination of ascorbic acid (AA) and dehydroascorbic acid (DHA), the two main forms of Vitamin C. The method consists of the DPP analysis of a quinoxaline obtained by the derivatization of DHA with o-phenylenediamine. Results using the proposed method correlated well with those obtained by two reference methodologies: the common iodometric method and a published chromatographic methodology. It was also used in the study of Vitamin C degradation in fruit juices, showing that it involves an initial oxidation of AA to DHA, followed by hydrolytic degradation of the latter.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11