| Autor: |
X YANG, KARL, LONARDO, ROBERT F., LIANG, ZHONGWEN, YUZEFOVSKY, ALEXANDER I., R. PRELI, FRANCIS, LONARDO, ROBERT F., LIANG, ZHONGWEN, YUZEFOVSKY, ALEXANDER I., PRELI, FRANCIS R., JR, HOU, XIANDENG, MICHEL, ROBERT G., HOU, XIANDENG, MICHEL, ROBERT G. |
| Zdroj: |
JAAS (Journal of Analytical Atomic Spectrometry); March 1997, Vol. 12 Issue: 3 p369-373, 5p |
| Abstrakt: |
The determination of tin in nickel-based alloys by laser-excited atomic fluorescence in a graphite furnace was investigated. The concentrations of tin in four nickel-based alloys from Pratt & Whitney Aircraft were determined. The nickel in the alloys was found to behave as a permanent chemical modifier that remained in the graphite tube during analyses. The use of a mixture of hydrofluoric, hydrochloric and nitric acids proved to be the most efficient dissolution method. In order to confirm the accuracy of the results, Zeeman-effect background corrected ETAAS and ICP-MS methods were also used. The results from these different methods were compared by use of the Student’st-test. The laser-excited atomic fluorescence method was found to be as accurate as the other techniques. The precisions of the techniques varied from 4 to 12% RSD. For the dissolution of 100 mg of nickel alloy in 100 ml of aqueous solution, the effective atomic fluorescence detection limit in the original nickel alloy samples was 1.5 ng g-1. The atomic fluorescence method was simple to develop and did not need a sophisticated background correction technique to perform the analyses. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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