Spectrophotometric Determination of Bromate in Water Using Multisyringe Flow Injection Analysis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Sara M Oliveira (Autor) Outra; Marcela A Segundo (Autor) FFUP; Antonio O S S Rangel (Autor) Outra; Jose L F C Lima (Autor) FFUP; Victor Cerda (Autor) Outra

Revista

Título: Analytical Letters

Vol. 44 Nº 4

Páginas: 284-297

ISSN: 0003-2719

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 13 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências da Saúde > Ciências farmacológicas

Outras Informações

ID Authenticus: P-002-XRB

DOI: 10.1080/00032719.2010.500771

Resumo (PT): A multisyringe flow injection system for the spectrophotometric determination of bromate in water is proposed, based on the oxidation of phenothiazine compounds by bromate in acidic medium. Several phenothiazines were tested, including chlorpromazine, trifluoperazine, and thioridazine. Higher sensitivity and lower LOD were attained for chlorpromazine. Interference from nitrite, hypochlorite, and chlorite was eliminated in-line, without any changes in the manifold. The automatic methodology using chlorpromazine allowed the determination of bromate between 25 and 750 µg L-1, with LOD of 6 µg L-1, good precision (RSD < 1.6%, n = 10), and determination frequency of 35 h-1. <br> <br> Keywords: Bromate; Multisyringe flow injection analysis; Phenothiazines; Spectrophotometry; Water <br> <a target="_blank" href="http://prod.informaworld.com/smpp/content~db=all~content=a933671164~frm=titlelink"> Texto integral </a> <br> <br>

Abstract (EN): A multisyringe flow injection system for the spectrophotometric determination of bromate in water is proposed, based on the oxidation of phenothiazine compounds by bromate in acidic medium. Several phenothiazines were tested, including chlorpromazine, trifluoperazine, and thioridazine. Higher sensitivity and lower LOD were attained for chlorpromazine. Interference from nitrite, hypochlorite, and chlorite was eliminated in-line, without any changes in the manifold. The automatic methodology using chlorpromazine allowed the determination of bromate between 25 and 750 mu gL-1, with LOD of 6 mu gL-1, good precision (RSD1.6%, n=10), and determination frequency of 35h-1.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14