Correction of Spectral Interferences with Mutual Interference Coefficient Matrix for Determination of Impurities in Bi-Based Superconductor Powder by Inductively Coupled Plasma Emission Spectrometry
BAO Rui1,LI Jian-qiang1*,JI Chun-hong1,FAN Hui-li1,SONG Xiu-hua2,CHEN Shan-shan2
1. School of Applied Science, University of Science and Technology Beijing, Beijing 100083, China 2. Innova Superconductor Technology Co. Ltd, Beijing 100176, China
Abstract：In the present paper a method was proposed for the determination of Fe, Cr, Ni, Si, Al and Ba in Bi-based superconductor powder (BSCCO, Bi2－xPbxSr2Ca2Cu3O8) by inductively coupled plasma atomic emission spectrometry(ICP-AES). The operation parameters for ICP-AES were optimized, and the influences of acid kind and concentration were examined. The interferences of matrix elements Bi, Sr, Pb, Ca and Cu in Bi-based superconductor powder on the determination of impurities were studied systematically. The interference coefficients of Bi, Sr, Pb, Ca and Cu were obtained for each target elements respectively, and the mutual interferences matrix was constituted with the above coefficients. The equated concentrations of background from matrix elements were calculated by interferences coefficients matrix and concentrations of Bi, Sr, Pb, Ca and Cu using Gaussian elimination with full pivoting method. Then the concentrations of impurities were obtained by calculation of differences. By means of the mutual interference coefficients matrix, the artificial sample was determined for the target elements with the recovery coefficient of 99.5%-100.5%. The superconductor powers were analysed with satisfactory results also, and the results were identical with the reference values from ICP-MS.
[1] Argyropoulou R, Ochsenk M Uhn-Petropoulou, Dounis C, et al. Journal of Materials Processing Technology, 2007, 181(1-3): 2. [2] YI Han-ping, ZHANG Jin-song, LIU Qing, et al(易汉平, 张劲松, 刘 庆, 等). The Chinese Journal of Nonferrous Metals(中国有色金属学报), 2004, 14(S1): 341. [3] Vase P, Flukiger R, Leghissa M, et al. Superconductor Science and Technology, 2000, 13: 71. [4] Tokuda T, Hidaka K, Kishida S. Physica C-Superconductivity and Its Applications, 2007, 463: 942. [5] Hamadneh I, Agil A, Yahya A K, et al. Physica C-Superconductivity and Its Applications, 2007, 463: 207. [6] Makarova M V, Kazin P E, Yu D, et al. Physica C-Superconductivity and Its Applications, 2005, 419: 61. [7] Yavuz M, Maeda H, Vance L, et al. Superconductior Science and Technology, 1998, 11: 1166. [8] Lilli Paama, Eed Prnoja, Paavo Permki. J. Anal. At. Spectrom, 2000, 15: 571. [9] Yang Xiuhuan, Wei Jinfang, Liu Hongtao. Spectrochimica Acta Part B., 1998, 53: 1405. [10] KAI Xiao-ming, LI Cheng, WANG Jie, et al(开小明, 李 诚, 王 杰, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2007, 27(12): 2576. [11] ZHU Xiao-mei, GE Hong-guang(朱小梅, 葛红光). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004, 24(10): 1262. [12] Barth P, Hassler J, Kudrik I, et al. Spectrochimica Acta Part B., 2007, 62: 924. [13] Karl X Yang, Kamal Swami. Spectrochimica Acta Part B, 2007, 62: 1177. [14] RUI Yu-kui, KONG Xiang-bin, QIN Jing(芮玉奎, 孔祥斌, 秦 静). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2007, 27(6): 1201. [15] TANG Hua-ying, FANG Yan, LIU Hui-li, et al(唐华应, 方 艳, 刘惠丽, 等). Metallurgical Analysis(冶金分析), 2007, 27(12): 43. [16] Ma Xiaoguo, Li Yibing. Analytica Chimica Acta, 2006, 579: 47.
