| Автор | Wan, Zhuo |
| Автор | Xu, Zhangrun |
| Автор | Wang, Jianhua |
| Дата выпуска | 2006 |
| dc.description | A flow injection (FI) on-line solid phase extraction (SPE) procedure for ultra-trace lead separation and preconcentration was developed, followed by hydride generation and atomic fluorescence spectrometric (AFS) detection. Lead is retained on an iminodiacetate chelating resin packed microcolumn, and is afterward eluted with 2.5% (v/v) hydrochloric acid to facilitate the hydride generation by reaction with alkaline tetrahydroborate solution with 1% (m/v) potassium ferricyanide as an oxidizing (or sensitizing) reagent. The hydride was separated from the reaction medium in the gasâ liquid separator and swept into the atomizer for quantification. The chemical variables and the FI flow parameters were carefully optimized. With a sample loading volume of 4.8 ml, quantitative retention of lead was obtained, along with an enrichment factor of 11.3 and a sampling frequency of 50 h<sup>â 1</sup>. A detection limit of 4 ng l<sup>â 1</sup>, defined as 3 times the blank standard deviation (3Ï ), was achieved along with a RSD value of 1.6% at the 0.4 µg l<sup>â 1</sup> level. The procedure was validated by determining lead contents in two certified reference materials, and its practical applicability was further demonstrated by analysing a variety of biological and environmental samples. |
| Формат | application.pdf |
| Издатель | Royal Society of Chemistry |
| Название | Flow injection on-line solid phase extraction for ultra-trace lead screening with hydride generation atomic fluorescence spectrometry |
| Тип | research-article |
| DOI | 10.1039/b511829h |
| Electronic ISSN | 1364-5528 |
| Print ISSN | 0003-2654 |
| Журнал | Analyst |
| Том | 131 |
| Первая страница | 141 |
| Последняя страница | 147 |
| Аффилиация | Wan Zhuo; Research Center for Analytical Sciences, Box 332, Northeastern University |
| Аффилиация | Xu Zhangrun; Research Center for Analytical Sciences, Box 332, Northeastern University |
| Аффилиация | Wang Jianhua; Research Center for Analytical Sciences, Box 332, Northeastern University |
| Выпуск | 1 |
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