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Determination of cobalt and iron in estuarine and coastal waters using flow injection with chemiluminescence detection

Citation

Cannizzaro, V and Bowie, AR and Sax, A and Achterberg, EP and Worsfold, PJ, Determination of cobalt and iron in estuarine and coastal waters using flow injection with chemiluminescence detection, Analyst, 125, (1) pp. 51-57. ISSN 0003-2654 (2000) [Refereed Article]

DOI: doi:10.1039/a907651d

Abstract

Flow injection with chemiluminescence detection (FI-CL) was used to determine cobalt and iron in estuarine and coastal waters. Cobalt(II) was determined by means of a pyrogallol-hydrogen peroxide-sodium hydroxide reaction in the presence of methanol and the surfactant cetyltrimethylammonium bromide (CTAB). With pyrogallol, the sensitivity was enhanced compared with the traditional reagent, gallic acid. The practical limit of detection in sea-water was 5 pM (3s) and there was good agreement with certified values for the sea-water CRMs NASS-5 (0.16 ± 0.01 nM), CASS-3 (0.60 ± 0.09 nM) and SLEW-2 (0.93 ± 0.13 nM). Results for an Irish Sea sample gave good agreement with data obtained using cathodic stripping voltammetry. Iron(II + III) was determined using a luminol reaction with dissolved oxygen as the oxidant. The practical limit of detection was 40 pM (3s) and results from shipboard analysis of the CRM NASS-4 (1.95 ± 0.14 nM) were in good agreement with the certified value (1.88 ± 0.29 nM). Field evaluation of the instrumentation and analytical methods was achieved through a series of local surveys in the Tamar Estuary (UK), from which environmental data are presented.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Flow Analysis
Objective Division:Environment
Objective Group:Physical and Chemical Conditions of Water
Objective Field:Physical and Chemical Conditions of Water in Coastal and Estuarine Environments
Author:Bowie, AR (Associate Professor Andrew Bowie)
ID Code:26325
Year Published:2000
Web of Science® Times Cited:39
Deposited By:IASOS
Deposited On:2003-05-30
Last Modified:2011-08-04
Downloads:0

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