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Mercury speciation using the Capillary Cold Trap coupled with microwave induced plasma atomic emission spectrometry
Citation
Dietz, C and Madrid, Y and Camara, C, Mercury speciation using the Capillary Cold Trap coupled with microwave induced plasma atomic emission spectrometry, Journal of Analytical Atomic Spectrometry, 16 pp. 1397-1402. ISSN 0267-9477 (2001) [Refereed Article]
Copyright Statement
Copyright 2001 The Royal Society of Chemistry
DOI: doi:10.1039/b107110f
Abstract
In this paper the capillary cold trap (CCT) is presented as a novel sample introduction and separation system for microwave-induced plasma detection. The method is based on cryogenic trapping and gas chromatographic separation carried out within the same capillary. The device, which comprises a derivatization step, on-line gas phase extraction, preconcentration and analyte separation, is semi-automated and all operational parameters are adjustable via an in-house developed control unit, regulating the selected parameters throughout the analysis process. Detection was carried out using a 2.45 GHz microwave-induced argon discharge sustained in a TM010 Beenakker cavity and emission lines were recorded by means of a ST6-UV CCD camera provided by the Santa Barbara Instrument Group. The detection limits achieved were 6.0, 0.95 and 1.25 ng L21 for dimethylmercury, methylmercury and inorganic mercury, respectively. A complete chromatogram could be obtained within 3 min, resulting in the duration of one whole analysis cycle of about 15 min. The proposed method was validated by the analysis of a reference material (BCR 710) and applied to mercury speciation in different sample matrices such as oyster, tuna fish and sediments after microwave-assisted extraction. The total mercury concentration in real samples was in the range of 0.2–11 mg kg21, of which up to 75% corresponded to organic mercury species.
Item Details
Item Type: | Refereed Article |
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Keywords: | microwave induced plasma, cold trap, mercury speciation |
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Instrumental methods (excl. immunological and bioassay methods) |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Natural hazards |
Objective Field: | Natural hazards not elsewhere classified |
UTAS Author: | Dietz, C (Dr Christian Dietz) |
ID Code: | 84814 |
Year Published: | 2001 |
Web of Science® Times Cited: | 27 |
Deposited By: | Central Science Laboratory |
Deposited On: | 2013-06-03 |
Last Modified: | 2017-06-06 |
Downloads: | 0 |
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