Interpretation of the interference mechanisms occuring in the determination of Sb(III) by Hydride Generation Atomic Absorption Spectrometry, based on normal reduction potentials
A comparative study was made of the magnitude of the interference that some chemical species produce in different inorganic acid media during the determination of Sb by hydride generation atomic absorption spectrometry (HGAAS). Differences were found in the effect of Al III, Cr VI, Mo VI, Sn IV, Ni...
| Autores: | , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 1995 |
| País: | España |
| Recursos: | Universidad de La Rioja (UR) |
| Repositório: | RIUR. Repositorio Institucional de la Universidad de La Rioja |
| OAI Identifier: | oai:portal.dialnet.es:doc/5bbc69cbb750603269e82199 |
| Acesso em linha: | https://investigacion.unirioja.es/documentos/5bbc69cbb750603269e82199 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Antimony determination Hydride generation atomic absorption spectrometry Normal reduction potential Simultaneous interference processes |
| Resumo: | A comparative study was made of the magnitude of the interference that some chemical species produce in different inorganic acid media during the determination of Sb by hydride generation atomic absorption spectrometry (HGAAS). Differences were found in the effect of Al III, Cr VI, Mo VI, Sn IV, Ni II, Co II, Cu II and Bi III', on the basis of these results it is possible to recommend the appropriate acidic medium for the determination of Sb by HGAAS depending on sample composition. An evaluation of interference mechanisms is also included. On the basis of results previously reported and those obtained in this work, a complete scheme, covering all the different interference mechanisms, is proposed. In particular, the use of conditional reduction potentials, and of their variation with pH, provides a basis for deducing, in a general way, whether or not a particular chemical species is capable of producing interference. |
|---|