| Autor: |
Greg Lawson, Jerome O. Nriagu, Ivan Sekerka, V. Cheam, R. Desrosiers, J. Lechner |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Analytica Chimica Acta. 269:129-136 |
| ISSN: |
0003-2670 |
| DOI: |
10.1016/0003-2670(92)85142-s |
| Popis: |
A copper vapor laser-pumped dye laser was used in the development of a laser-excited atomic fluorescence spectrometer, which was optimized to give low-ng 1 −1 sensitivity. Using the spectrometer, a method was developed for direct determination of lead in Great Lakes water samples. This is the first time that direct analyses of such samples have been successfully achieved. Existing methods require these samples to be preconcentrated before they can be analysed. The following performance characteristics were achieved: satisfactory recoveries (within 3%) for two certified reference materials, a relative standard deviation of 4.9% at the 10 ng 1 −1 level, 53 spike recoveries within 100 ± 10% and a working detection limit of 0.4 ng 1 −1 with a 25-μl injection volume (10 fg absolute). the 18-MΩ water used was found to contain less than 0.9 ng 1 −1 of lead. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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