Direct Determination of Copper, Iron and Sodium in High-Purity Alumina by Slurry Introduction Furnace Atomic Absorption Spectrometry with Smith-Hieftje Background Correction
LU Gui-ping1, 2, WANG Zheng1*, QIU De-ren3, ZOU Hui-jun1, HE Yan-feng2
1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 2. Changchun University of Technology, Changchun 130012, China 3. Department of Chemistry, Fudan University, Shanghai 200433, China
Abstract：Direct determination of copper, iron and sodium in high-purity alumina was performed by slurry-furnace atomic absorption spectrometry with Smith-Hieftje background correction (S-H-GFAAS). Instrument conditions of GFAAS such as pyrolysis, atomization and hollow cathode lamp current by S-H background correction were optimized, and the optimal experimental conditions were selected. Calibration was performed using aqueous standards method for sample analysis. The accuracy of the proposed method was shown for the case of Al2O3 (AKP-30), and compared with those obtained by furnace atomic absorption spectrometry subsequent to decomposition by sulfuric acid in PTFE pressure vessels. The results were in agreement well with values found in the literature by different methods. It is a simple, convenient and accurate method and it is suitable for the rapid analysis of trace element in alumina. The linear regression coefficients of the calibration curves were better than 0.999 0. The detection limits were 0.66，2.5 and 0.13 ng·g-1, respectively, with a relative standard deviation being not more than 5.2%.
卢桂萍1, 2，汪 正1*，邱德仁3，邹慧君1，贺岩峰2 . 悬浮液进样自吸扣背景石墨炉原子吸收光谱法测定高纯氧化铝中铜、铁和钠含量 [J]. 光谱学与光谱分析, 2011, 31(01): 244-248.
LU Gui-ping1, 2, WANG Zheng1*, QIU De-ren3, ZOU Hui-jun1, HE Yan-feng2 . Direct Determination of Copper, Iron and Sodium in High-Purity Alumina by Slurry Introduction Furnace Atomic Absorption Spectrometry with Smith-Hieftje Background Correction . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(01): 244-248.
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