电感耦合等离子体发射光谱法测定富镁铁橄榄岩类矿石中铜镍铁和氧化镁

张旺强; 王春妍; 李瑞仙; 巨力佩; 陈月源; 余志峰; 毛振才

电感耦合等离子体发射光谱法测定富镁铁橄榄岩类矿石中铜镍铁和氧化镁

1.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050
2.
兰州兰石换热设备有限责任公司, 甘肃兰州 730050
3.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050
4.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050
5.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050
6.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050
7.
国土资源部兰州矿产资源监督检测中心, 甘肃兰州 730050

基金项目:

科技支撑广西北部湾经济区发展专项资助(桂科转09320026)

广西自然科学基金项目资助(桂科自0991295)

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出版历程
- 收稿日期: 2010-04-28
- 修回日期: 2010-10-20

Determination of Cu, Ni, Fe and MgO in Rich Fe-Mg Peridotite Rocks by Inductively Coupled Plasma-Atomic Emission Spectrometry

1.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China
2.
Lanzhou LS Heat Exchange Equipment Co., Ltd, Lanzhou 730050, China
3.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China
4.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China
5.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China
6.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China
7.
Lanzhou Testing and Quality Supervision Center for Geological and Mineral Products, The Ministry of Land Resources, Lanzhou 730050, China

摘要

摘要: 样品经氢氟酸-盐酸-硝酸-高氯酸混合酸一次加入冷浸直接溶解,在5%(体积分数)的盐酸介质中,用电感耦合等离子体发射光谱法测定富镁铁橄榄岩类矿石中的铜、镍、铁、氧化镁,克服了传统分析方法操作繁琐、周期长、成本高,而过程难以控制等缺点。方法检出限为铜2.0 μg/g,镍3.0 μg/g,铁 10 μg/g,氧化镁20 μg/g;精密度(RSD,n=12)为0.8%~4.1%。经国家一级标准物质分析验证,测定值与标准值吻合,结果准确可靠。对于富镁铁岩类矿石中含量较高的硫化物的测定,采用一次加混合酸冷浸除硫后,再加热分解样品,结果令人满意;其中含量较高的铁和氧化镁,采用分取稀释测定,减小基体干扰。建立的方法样品处理程序简单快速,线性范围宽,分析重现性好,适用于地质部门批量样品的分析。
- 铜 /
- 镍 /
- 铁 /
- 氧化镁 /
- 橄榄岩 /
- 电感耦合等离子体发射光谱法
Abstract: Samples were digested with mixed acids of HF-HCl-HNO₃-HClO₄, in 5% HCl solution. Peridotite enriched Cu, Ni, Fe, MgO were directly determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The method overcomes the shortfalls of traditional methods such as: long-term, complicated chemical procedure and the chemical procedure being difficult to control. The detection limits of the method are 2.0 μg/g for Cu, 3.0 μg/g for Ni, 10 μg/g for Fe and 20 μg/g for MgO. The reliability of the method has been tested by determination of those elements in national standard references and the results are in good agreement with certified values with precisions of 0.8%-4.1% RSD (n=12). Satisfactory results were obtained for the ores present in Fe-Mg enriched rocks with higher sulfides composition by using the technique of cold soaking in mixed acids to remove sulphur and then digestion with heating. The sample solution was diluted before measurement to decrease matrix effect for the sample with high concentrations of Fe and MgO. This method exhibits simplicity, rapidity, good reproducibility and wide linearity. It is suitable for a multi-elemental determination of dissolved minerals.
- Cu /
- Ni /
- Fe /
- MgO /
- peridotite /
- rock