Gas phase molecular absorption spectrometry: determination of sulphide with diode- array detection
A method is described for determining sulphite by SO 2 generation and UV-visible molecular absorption spectrometry with diode-array detection. The molecular absorption maximum of SO 2 appears at 198 nm. The parameters affecting generation (particularly those relating to the kinetics of the process)...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1997 |
| País: | España |
| Institución: | Universidad de La Rioja (UR) |
| Repositorio: | RIUR. Repositorio Institucional de la Universidad de La Rioja |
| OAI Identifier: | oai:portal.dialnet.es:doc/5bbc695ab750603269e819ac |
| Acceso en línea: | https://investigacion.unirioja.es/documentos/5bbc695ab750603269e819ac |
| Access Level: | acceso abierto |
| Palabra clave: | Air samples Molecular absorption spectrometry Sulphite UV-gas phase |
| Sumario: | A method is described for determining sulphite by SO 2 generation and UV-visible molecular absorption spectrometry with diode-array detection. The molecular absorption maximum of SO 2 appears at 198 nm. The parameters affecting generation (particularly those relating to the kinetics of the process) and determination are optimized; under the optimum conditions found, only a 30 s preconcentration time is necessary. The linear response range is between 10 and 1000 μg ml -1 of SO 2- 3, the RSD is 3.5% and the detection limit is 3.2 μg ml -1. The effect of different species on the SO 2 signal is also studied. The method is applied to the determination of SO 2 in air samples. |
|---|