Development of a sequential injection analysis system for the potentiometric determination of nitrite in meat products by using a Gran's plot method

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Nestor Zarate (Autor) Outra; Maria P Pilar Ruiz (Autor) Outra; Ricardo Perez Olmos (Autor) Outra; Alberto N Araujo (Autor) FFUP; Maria Conceicao B S M Montenegro (Autor) FFUP

Revista

Título: Mikrochimica Acta

Vol. 165 Nº 1

Páginas: 117-122

ISSN: 0026-3672

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 7 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-003-M94

DOI: 10.1007/s00604-008-0107-1

Abstract (EN): This article describes a potentiometric multi-task flow system, based on the sequential injection analysis (SIA) concept, developed to quantify the nitrite contained in cured meat products. The manifold includes a mixing chamber to provide the automatic on-line generation of the solutions required for the multiple standard additions method, adopted as potentiometric analytical technique of measurement. The assessment of nitrite concentration was accomplished by using the Gran's plot approach. A 0.16 mol L-1 silver sulphate solution, prepared in ammonia hydroxide, was used to remove the salt present in the samples since chloride ion is one of the most important interfering agents of the nitrite selective electrode. The procedure, when applied to different types of meat samples, showed relative standard deviations better than 3% with a sampling rate of 20 samples h(-1). The results obtained statistically agreed with those obtained by application of a modification of the well-known Griess spectrophotometric method adopted as a reference technique.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6