岩矿测试2011，Vol.30Issue(3)：315-317,3.
电感耦合等离子体发射光谱法测定铝土矿样品中镓三种前处理方法的比较
The Comparison of Three Sample Pretreatment Methods in Determination of Gallium in Bauxite Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry
杨载明1
作者信息
- 1. 贵州省地质矿产勘查开发局一○六地质大队,贵州遵义,563000
- 折叠
摘要
Abstract
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. Due to the Ga reacts with HCl to form GaCl3 which is easy to volatilize from the solution system, the measured Ga concentration is much lower than the certified value. The bauxite ores also were incompletely dissolved by HF-HNO3-H2SO4 mixed acids with lower concentration for Ga. Nevertheless, the bauxite ores were completely digested by alkali fusion with clear solution. The NaCl in solution can protect Ga lossing by volatilization to obtain accurate result. 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. 21μg/g and less than 5％ RSD (n = 11). The obtained result is generally consistent with certified value of both first and second grade national standard reference materials.关键词
镓/铝土矿/样品分解/电感耦合等离子体发射光谱法Key words
gallium/ aluminum ore/ sample decomposition/ inductively coupled plasma-atomic emission spectrometry引用本文复制引用
杨载明..电感耦合等离子体发射光谱法测定铝土矿样品中镓三种前处理方法的比较[J].岩矿测试,2011,30(3):315-317,3.
