Optimized arsenic, selenium and mercury determinations in aqueous solutions by energy dispersive x-ray fluorescence after preconcentration onto zirconium-loaded activated charcoal
✍ Scribed by Sirpa Peräniemi; Markku Ahlgrén
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 606 KB
- Volume
- 302
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
Adsorption onto zirconium-loaded activated charcoal ( ZrC * ) allows the efficient collection of arsenic, selenium and mercury from aqueous solutions in a thin layer, and at the same time removes or minimizes elemental interferences. When this preconcentration method is combined with energy dispersive x-ray fluorescence, the resulting analysis is accurate and precise. The method is simple and rapid and almost free from contamination because only a small amount of sodium hydroxide or nitric acid is required for pH adjustment, in addition to ZrC' adsorbent. Spectral interferences from other elements are negligible because the ZrC' adsorbent is highly selective. The procedure is also suitable for the determination of organometallic compounds of arsenic, selenium and mercury.