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Determination of Sb using microwave induced plasma atomic emission spectrometry after preconcentration in a cryogenic trap

Citation

Dietz, C and Madrid, Y and Quevauvillier, P and Camara, C, -, Determination of Sb using microwave induced plasma atomic emission spectrometry after preconcentration in a cryogenic trap, Quimica Analitica, 17 ISSN 0212-0569 (1998) [Refereed Article]

Copyright Statement

Copyright 1998 Elsevier Press S.A.

Abstract

This paper describes a system in which antimony hydride generation with a preconcentration step in a cryogenic trap is combined with detection using MIP-AES. The MIP operates at atmospheric pressure with a forward power of 30 - 180 Watt, using a TM010 cavity (Beenakker resonator), equipped with a tangential flow torch design, which allows the use of metal-loaded helium or other molecular gases as carrier gas and argon as internal plasma gas. The plasma emission was observed end-on. Antimony hydride was generated batchwise in aqueous medium, preconcentrated in a liquid nitrogen cryogenic trap and then evaporated by electrical heating into the plasma discharge. The optimum working conditions were at 217.6 nm with a forward power of 130 Watt, a plasma gas flow rate of 335 ml/min of argon, a carrier gas flow rate of 134 ml min-1 of helium, a NaBH4 concentration of 0.50 % and acetic acid concentration of 0.87 M. Under these conditions a detection limit of 9 ng of Sb(III) in a total sample volume of 100 ml was achieved. This is about 100-times lower than the corresponding continuous hydride generation. The proposed method has been successfully applied to the determination of Sb in environmental samples.

Item Details

Item Type:Refereed Article
Keywords:microwave induced plasma, antimony, cryogenic trap
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Environment
Objective Group:Environmental and Natural Resource Evaluation
Objective Field:Environmental and Natural Resource Evaluation not elsewhere classified
Author:Dietz, C (Dr Christian Dietz)
ID Code:84808
Year Published:1998
Web of Science® Times Cited:1
Deposited By:Central Science Laboratory
Deposited On:2013-06-03
Last Modified:2013-08-02
Downloads:0

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