Fluorimetric determination of fluoride in a flow assembly integrated on-line to an open/closed FIA system to remove interference by solid phase extraction
A simple flow injection fluorimetric method for fluoride determination is proposed. The method is based on the enhanced fluorescence of quercitin-Zr(IV) complex when fluoride ion is present in the sample. An open/closed FIA manifold with a mini-column of Dowex 50W X8 resin was used to remove the mos...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2002 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/96901 |
| Acceso en línea: | http://hdl.handle.net/11336/96901 |
| Access Level: | acceso abierto |
| Palabra clave: | FLUORIMETRIC OPEN/CLOSED FIA SYSTEM SOLID PHASE EXTRACTION https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| Sumario: | A simple flow injection fluorimetric method for fluoride determination is proposed. The method is based on the enhanced fluorescence of quercitin-Zr(IV) complex when fluoride ion is present in the sample. An open/closed FIA manifold with a mini-column of Dowex 50W X8 resin was used to remove the most important interference (aluminum). The two FIA assemblies were integrated on-line to automate the pretreatment of the water sample and fluoride determination. The calibration graph was linear over the range 0.1-3.0 μg ml-1 of fluoride with a correlation coefficient of 0.999 and LOD 0.06 μg ml-1. The relative standard deviation was 2.5% and the sample throughput was 52 h-1 without pretreatment and 10 h-1 with pretreatment of the sample. The method was applied to the determination of fluoride in water samples. |
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