微波消解-电感耦合等离子体原子发射光谱法测定氧化铁粉中14种元素

Determination of fourteen elements in iron oxide by microwave digestion inductively coupled plasma atomic emission spectrometry

提出了微波消解电感耦合等离子体原子发射光谱(ICP-AES)同时测定酸再生氧化铁粉中铝、硅、硫、钙、锰、硼、钛、镁、钾、钠、磷、铬、镍、铜等14种元素的分析方法。采用微波消解技术消解酸再生氧化铁粉,考察了微波消解时间、功率和压力对消解效果的影响,选择了最佳工作参数。通过ICP-AES仪器的FACT软件,选择合适的分析谱线,避免了基体干扰和元素之间的光谱干扰。同时对溶样条件、基体影响的机理等进行了探讨。微波消解方法测量结果的回收率及相对标准偏差(n=6)均优于常规溶样方法。对酸再生氧化铁粉样品的测定结果与传统湿法分析的结果相一致。

A method for simultaneous determination of fourteen elements including A1, Si, S, Ca, Mn, B, Ti, Mg, K, Na, P, Cr, Ni, Cu in acid-regenerated iron oxide by microwave digestion inductively coupled plasma atomic emission spectrometry （ICP-AES） was studied. The digestion time, power and pressure for microwave digestion were optimized. Proper spectral lines were selected through FACT software in ICP-AES spectrometer,avoiding matrix interference and spectral interference between elements. Moreover, the dissolving conditions and mechanism of matrix effect were discussed. The recovery and relative standard deviation （n = 6） of microwave digestion method were both better than normal dissolving method. The determination results for acid-regenerated iron oxide powder were in accordance with those obtained by traditional wet analysis method.