Spectrophotometric Determination of Bromate in Water Using Multisyringe Flow Injection Analysis

• Type: Article in International Scientific Journal
• Date: 2011

Authors

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

Journal

Title: Analytical Letters

Vol. 44 No. 4

Pages: 284-297

ISSN: 0003-2719

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 13 Citations

ISI Web of Science

Scopus - 13 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Health sciences > Pharmacological sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14