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Speciation of mercury by ICP-MS after on-line capillary cryofocussing and ambient temperature multicapillary gas chromatography

Citation

Wasik, A and Rodriguez Pereiro, I and Dietz, C and Szupunar, J and Lobinski, R, Speciation of mercury by ICP-MS after on-line capillary cryofocussing and ambient temperature multicapillary gas chromatography, Analytical Communications, 35 pp. 331-335. ISSN 0003-2654 (1998) [Refereed Article]

Copyright Statement

Copyright 1998 Royal Society of Chemistry

DOI: doi:10.1039/A806092D

Abstract

An automated, small and easily mountable/demountable accessory based on a constant temperature multicapillary GC is proposed for time-resolved introduction of gaseous mercury species into an ICP-MS. The fast, narrow-band injection was achieved by cryofocussing (280 C) of dimethyl-, methylethyl- and diethylmercury in an 11 cm capillary housed in a steel tube prior to desorption of the species (within 35 s) by rapid-pulse high intensity current. The highest chromatographic resolution was achieved at ambient column temperatures; isothermal separations at higher temperatures offered increased sensitivity and speed of analysis controlled by the data acquisition rate of a quadrupole MS. The compatibility of the operating variables with the ICP ionization conditions (argon at 50300 ml as the carrier gas) and negligible peak broadening on the column and in the ICP-MS interface allow the sensitive (limit of detection 0.15 pg) isotope-selective speciation of mercury in biological and sediment samples.

Item Details

Item Type:Refereed Article
Keywords:mercury speciation, automated
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Instrumental Methods (excl. Immunological and Bioassay Methods)
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management at Regional or Larger Scales
Author:Dietz, C (Dr Christian Dietz)
ID Code:84809
Year Published:1998
Deposited By:Central Science Laboratory
Deposited On:2013-06-03
Last Modified:2017-06-06
Downloads:0

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