微波消解-等离子体原子发射光谱法测定3种铅锌矿物中的10种组分

Determination of 10 Components in Lead Ore,Lead Concentrates and Lead-zinc Ore Using Inductively Coupled Plasma Atomic Emission Spectrometry and Microwave-assisted Digestion

关键词:  铅矿  铅精矿  铅锌矿  微波消解  电感耦合等离子体发射光谱法

Key words:  lead ore  lead concentrates  lead-zinc ore  microwave assisted digestion  inductively coupled plasma atomic emission spectrometry

摘要:

铅矿、铅精矿、铅锌矿经混合酸(HCl+HNO₃+HF)在高压密闭容器中微波消解后,通过电感耦合等离子体发射光谱法测定样品中的Zn、CaO、Na₂O、MnO、MgO、As、Cu、Cd、Al₂O₃、K₂O共10种组分。最佳仪器工作条件为:功率1.3 kW,等离子体气流量15 ml/min,辅助气流量0.2 ml/min,样品提升量1.5 ml/min。各元素相关系数均大于0.9991,回收率91.3%~109.7%。

Abstract:

Lead ore,lead concentrates and lead-zinc ore were prepared by microwave assisted digestion in a pressurized vessel mixed with HCl,HNO₃ and HF.Ten components in sample solution including zinc,calcium oxide,sodium,hydroxide,manganese oxide,magnesiumoxide,arsenic,copper,cadmium,alumina and potassium hydroxide were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES).The optimum working conditions of the instrument was obtained.The powder was 1.3 kW.The plasma gas flow rate was 15 mL/min.The auxiliary gas flow rate was 0.2 mL/min.The sample uptake amount was 1.5 mL/min.The correlation coefficient of all elements was over 0.9991 and the recovery rate was 91.3%~109.7%.