Direct determination of dissolved and total thallium in lake waters by laser-excited atomic fluorescence spectrometry / by V. Cheam, J. Lechner, R. Desrosiers and I. Sekerka. : En13-5/94-39E-PDF
"Thallium is a highly toxic, under-studied priority element. However, it has recently created much interest due to fresh and rapid improvements in detection limit. It appears that there are no published Tl data for Great Lakes waters, likely due to the poor sensitivity of classical methods. An electrothermal Laser-Excited Atomic Fluorescence Spectrometer has been optimized to detect sub-femtogram of thallium and used to develop a method for direct determination of dissolved and total thallium in lake waters. The method voids the labor-intensive, contamination-prone tasks of filtration, centrifugation and acid digestion of collected particulates. Adequate precision and recoveries were achieved using several lake waters (undigested and digested) and a certified reference material. The concentration of thallium in the acidified (0.2% HNO₃) Milli-Q-Water was monitored over a period of four months and averaged 0.02 ± 0.01 ng/l. The concentration in Hamilton Harbor ranged from 3 to 48 ng/l. The mean of dissolved / total fraction of Tl in the Harbor water was 80%"--Abstract.
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| Ministère/Organisme | Canada. Environment Canada. National Water Research Institute (Canada). Aquatic Ecosystem Restoration Branch. Canada. Water Science and Technology Directorate. |
|---|---|
| Titre | Direct determination of dissolved and total thallium in lake waters by laser-excited atomic fluorescence spectrometry / by V. Cheam, J. Lechner, R. Desrosiers and I. Sekerka. |
| Titre de la série | [NWRI contribution] ; 94-39 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 9-10). |
| Information sur la publication | Burlington, Ontario, Canada : National Water Research Institute, Aquatic Ecosystem Restoration Branch, [1994] |
| Auteur / Contributeur | Cheam, V., author. Lechner, Josef F., author. Desrosiers, R. J., author. Sekerka, I., author. |
| Description | 1 online resource (2 unnumbered pages, 13 pages, 5 unnumbered pages) : illustrations. |
| Numéro de catalogue |
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| Descripteurs | Lakes Water Pollutants Chemistry |