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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 0.211 mg kg21, of which up to 75% corresponded to organic mercury species.

Item Details

Item Type:Refereed Article
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:Environment
Objective Group:Natural Hazards
Objective Field:Natural Hazards in Mining Environments
Author:Dietz, C (Dr Christian Dietz)
ID Code:84814
Year Published:2001
Web of Science® Times Cited:25
Deposited By:Central Science Laboratory
Deposited On:2013-06-03
Last Modified:2017-06-06
Downloads:0

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