新型铈铁硼中铅含量的测定方法研究

通过对新型铈铁硼材料中铅含量的测定方法研究,开发了以电感耦合等离子体发射光谱(ICP-OES)法测定铈铁硼中铅含量的方法。实验研究了分析谱线的选择,以铈和铁为基体配制标准溶液,用6%体积浓度的稀硝酸低温加热消解铈铁硼,用基体匹配法测定了铈铁硼中铅的含量。最后通过方法检出限的计算、加标回收率实验、平行实验和重复性测试,验证了方法的可靠性。实验结果表明,该方法的检出限为0.007 mg/L,加标回收率为100.6%,样品中铅含量为0.006%,两次实验平行性好,重复性低于2.3%,数据准确可靠。该方法具备实验室可操作性,可以为新型铈铁硼生产中的铅含量杂质分析提供依据,也可为重金属污染检测提供参考。

Study on the determination method of lead content in new cerium iron boron

The determination of lead content in new cerium iron boron material has been studied and a new method of determination of lead content in cerium iron boron by inductively coupled plasma optical emission spectrometry (ICP-OES) has been developed. The selection of analytical spectrum lines was studied. Cerium and iron were used as matrix to prepare the standard solutions, and the content of lead in cerium iron boron was determined by matrix matching method. Finally, the reliability of the method was verified by calculation of detection limit, standard recovery test, parallel test and repeatability test. The test results showed that the detection limit of the method was 0.007 mg/L, the recovery rate was 100.6%, and the content of lead in the sample was 0.006%. The parallelism between the two tests was good, and the repeatability was lower than 2.3%. This method is feasible in laboratory, and can provide a basis for the analysis of lead content impurity in the production of new cerium iron boron, as well as a reference for the detection of heavy metal pollution.