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

journal contribution
posted on 2023-05-17, 18:02 authored by Christian DietzChristian Dietz, Madrid, Y, Quevauvillier, P, Camara, C
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.

History

Publication title

Química Analítica

Volume

17

Pagination

205-212

ISSN

0212-0569

Publisher

Elsevier Press S.A.

Place of publication

Barcelona, Spain

Rights statement

Copyright 1998 Elsevier Press S.A.

Repository Status

  • Restricted

Socio-economic Objectives

Other environmental management not elsewhere classified

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