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| Determination of Cadmium in Nickel Base Superalloy by Flame Atomic Absorption Spectrometry |
| Received:July 29, 2019 Revised:July 29, 2019 |
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| DOI：doi:10.3969/j.issn.2095-1035.2020.02.003 |
| KeyWord:microwave digestion; flame atomic absorption spectrometry(FAAS); nickel base superalloy |
| Author | Institution |
| LYU Ting |
上海材料研究所 |
| GUO Ying |
上海材料研究所 |
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| Abstract: |
| The flame atomic absorption spectrometry (FAAS) method was established for determination of cadmium in nickel base superalloy. Samples of nickel base superalloy were digested with a mixture of nitric acid, hydrofluoric acid and water(1+1+1), and Cd 228.8 nm was selected as analytical lines. The standard addition method was used to prepare calibration curve to eliminate the matrix effect.The selection of digestive acid, the optimization of instrument parameters, the influences of matrix and coexisted ions on the determination of were also studied. The results showed that: The detection limit was 0.088 mg/L for Cd, the recovery rates in the samples were ranged from 94.1% to 109.3 %, and the relative standard deviations (RSD, n = 8) of determination results were between 0.54 % and 1.6 %. The method is simple, rapid and accurate, and thus suitable for the analysis of the cadmium in nickel base superalloy with cadmium content of 0.0001 ~ 0.001 %. |
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