Determination of cerium, erbium, gadolinium, lanthanum, neodymium and yttrium in titanium alloy by inductively coupled plasma atomic emission spectrometry
CHU Lian-qing,LI Jian,MAO Xin-qi
The 46th Research Institute of CETC,Tianjin 300220,China
Abstract：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).
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