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Spectrophotometric determination of Bromate in water using multisyringe flow injection analysis
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Orientador(es)
Resumo(s)
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 lgL 1, with LOD of 6 lgL 1, good precision
(RSD<1.6%, n¼10), and determination frequency of 35 h 1.
Descrição
Palavras-chave
Bromate Multisyringe flow injection analysis Phenothiazines Spectrophotometry Water
Contexto Educativo
Citação
OLIVEIRA, Sara M....[et al] - Spectrophotometric determination of Bromate in water using multisyringe flow injection analysis. Analytical Letters. ISSN 0003-2719. Vol. 44 (2011), p.84–297
Editora
Taylor & Francis