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The capillary cold trap as a suitable instrument for mercury speciation by volatilization, cryogenic trapping and gas chromatography coupled with atomic absorption spectrometry

Citation

Dietz, C and Madrid, Y and Quevauvillier, P and Camara, C, The capillary cold trap as a suitable instrument for mercury speciation by volatilization, cryogenic trapping and gas chromatography coupled with atomic absorption spectrometry, Analytical Chemistry, 72, (17) pp. 4178 - 4184. ISSN 0003-2700 (2000) [Refereed Article]

Copyright Statement

Copyright 2000 American Chemical Society

DOI: doi:10.1021/ac000232g

Abstract

An innovative accessory for speciation analysis has been developed. The system is based on the combination of cryogenic trapping and gas chromatographic separation, carried out within the same capillary. The instrument, hyphenating derivatization, gas-phase extraction, preconcentration, and analyte separation, is semiautomated, and all operational parameters are adjustable via an in-housedeveloped control unit, which regulates the selected parameters throughout the analysis process. Species detection was carried out by atomic absorption spectrometry. The detection limits achieved were 33, 39, and 71 ng L-1 for dimethylmercury, methylmercury, and inorganic mercury, respectively. A complete chromatogram could be obtained within three minutes, resulting in the duration of one whole analysis cycle of about 15 min. The proposed method was applied to mercury speciation in freeze-dried tuna fish powder after microwave-assisted extraction, finding that mercury is present at 80% as methylmercury and about 20% as inorganic mercury, in this kind of biological material.

Item Details

Item Type:Refereed Article
Keywords:capillary cold trap, mercury speciation
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Environment not elsewhere classified
Author:Dietz, C (Dr Christian Dietz)
ID Code:84812
Year Published:2000
Web of Science® Times Cited:12
Deposited By:Central Science Laboratory
Deposited On:2013-06-03
Last Modified:2013-07-02
Downloads:0

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