The Comparison of Three Sample Pretreatment Methods in Determination of Gallium in Bauxite Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry
详细信息
- 责任者：Yang Zaiming (No.106 Geological Team ; Bureau of Geology and Mineral Exploration and Development of Guizhou Province ; Zunyi 563000 ; China)
- 刊名：Rock and Mineral Analysis
- 出版年：2011
- 卷期：30(3)
- 关键词：ICP—AES ; inductively coupled plasma atomic emission spectroscopy ; 镓 ; gallium
- 页码：p.315-317
- 图表：3 tables, 10 refs.
- 分类号：0900
- 出版序号：931
- issnNo：ISSN0254-5357
- isbnNo：CN11-2131/TD
摘要
///The bauxite ores were digested by three different pretreatments as HCl-HNO3-HF-HClO4 mixed acids, HF-HNO3-H2SO4 mixed acids and alkali fusion. The Ga was measured by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The HCl-HNO3-HF-HClO4 mixed acids incompletely dissolved the bauxite ores with a large amount of residues. The bauxite ores also were incompletely dissolved by HF-HNO3-H2SO4 mixed acids with lower concentration for Ga. The method of alkali fusion, HCl extraction and measurement by ICP-AES produces high precision and accurate result for Ga with detection limit of 3.21 μg/g and less than 5% RSD (n=11). The result is generally consistent with certified value of both first and second grade national standard reference materials.