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| Determination of Trace Thallium in Zn-Matrix Material by Graphite Furnace Atomic Absorption Spectrometry |
| Received:November 11, 2013 Revised:December 10, 2013 |
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| DOI：doi:10.3969/j.issn.2095-1035.2014.02.002 |
| KeyWord:thallium; graphite furnace atomic absorption spectrometry; zinc matrix material; matrix modifier |
| Author | Institution |
| CHENG Jian |
深圳中金岭南公司 丹霞冶炼厂，广东 仁化 |
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| Abstract: |
| The sample was dissolved by B -HNO3-A and palladium nitrate was used as matrix modifier. The optimal conditions of instrumental analysis were tested and the results as follows: ashing temperatures were 500 ℃ and atomization temperature was 1 800 ℃. Under the optimal conditions, graphite furnace AAS method was successfully applied to determine the trace thallium in zinc concentrates that was used as zinc-matrix material for refining zinc by hydrometallurgical method , calcine, zinc oxide, zinc powder, etc. The results were basically consistent with those by ICP-MS method. The relative standard deviations (RSD, n ≤ 8) were 1.7%~7.8% and the recovery rates were 99%~103%. |
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