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Completely automated system for determining halogenated organic compounds by multisyringe flow injection analysis

Citation

Maya, F and Estela, JM and Cerda, V, Completely automated system for determining halogenated organic compounds by multisyringe flow injection analysis, Analytical Chemistry, 80, (15) pp. 5799-5805. ISSN 0003-2700 (2008) [Refereed Article]

Copyright Statement

Copyright 2008 American Chemical Society

DOI: doi:10.1021/ac8004633

Abstract

A new, multisyringe flow injection setup was designed to develop the first completely automated flow methodology for the expeditious, accurate in-line determination of halogenated organic compounds (HOCs) in water. The target compounds are preconcentrated and isolated by solid-phase extraction. Following elution, previously organically bound halogens are released as free hydrogen halides by the combined action of UV light and a chemical oxidant for their subsequent spectrophotometric determination by reaction with Hg(SCN)2 and Fe3+. Optimizing the major hydrodynamic and chemical variables resulted in improved performance. Recovery of various HOCs was assessed, and potential interferents were examined. Under the selected operating conditions, the proposed method exhibits variable analytical performance depending on the particular sample volume used (e.g., a sample volume of 5 mL provides a linear working range of 140−2000 μg L−1, a LOD of 100 μg L−1, and a throughput of 9 samples h−1). The method was successfully used to determine total adsorbable organic halogens (AOX) in well water and leachates, and the results validated against an AOX reference method. The role of the proposed system in the environmental analytical field is critically discussed.

Item Details

Item Type:Refereed Article
Keywords:flow analysis, environmental analysis
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Flow Analysis
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Maya, F (Mr Fernando Maya Alejandro)
ID Code:127864
Year Published:2008
Web of Science® Times Cited:10
Deposited By:Chemistry
Deposited On:2018-08-19
Last Modified:2018-09-06
Downloads:0

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