材料期刊网

采用硫酸(1+2)溶解样品,选择Ce 418.659 nm、Er 326.478 nm、Gd 342.246 nm、La 408.671 nm、Nd 406.108 nm和Y 371.029 nm为分析线,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定Ce、Er、Gd、La、Nd、Y,从而建立了钛合金中Ce、Er、Gd、La、Nd、Y的测定方法.对共存元素的干扰情况进行了研究,得到各干扰元素的干扰系数,采用干扰系数校正法解决谱线干扰问题.各元素质量分数在0.005%~2.00%范围内校准曲线线性关系良好,相关系数均大于0.999 9,方法检出限为3~14 μg/g.采用实验方法对钛合金标准样品、钛合金样品中Ce、Er、Gd、La、Nd、Y进行测定,结果的相对标准偏差 (RSD,n=6)为0.63%~8.1%,结果与认定值或电感耦合等离子体质谱法(ICP-MS)测定值基本一致.

A method for determination of Ce, Er, Gd, La, Nd and Y in titanium alloys by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established.The sample was dissolved with sulfuric acid (1+2).Ce 418.659 nm, Er 326.478 nm, Gd 342.246 nm, La 408.671 nm, Nd 406.108 nm and Y 371.029 nm was selected as analytical line, respectively.The interference of coexisting elements was investigated.The interference coefficients of elements were obtained to correct the spectral interference problems.The results showed that the linearity of calibration curves was good for elements with mass fraction in range of 0.005%-2.00%.The correlation coefficients were higher than 0.999 9.The detection limits were between 3 μg/g and 14 μg/g.The content of Ce, Er, Gd, La, Nd and Y in certified reference materials and actual samples of titanium alloy was determined according to the experimental method.The relative standard deviations (RSD, n=6) were between 0.63% and 8.1%.The found results were basically consistent with the certified values or those obtained by inductively coupled plasma mass spectrometry (ICP-MS).