Application of inductively coupled plasma atomic emission spectrometry in phase analysis of kyanite in a mining area of Gansu Province
XIE Haidong1, LU Haiyan1, YANG Xiaowen1, YU Zhifeng2, FANG Hongshu1, KONG Xiaoyan1
1. Qinghai Geological and Mineral Testing and Application Center,Xining 810021,China; 2. Central Laboratory of Geology and Mineral Resources of Gansu Province,Lanzhou 730050,China
Abstract：The phase analysis of kyanite only by chemical analysis cannot meet the geological requirements. The experiments must be carried out according to the ore composition. Based on the composition characteristics of kyanite in a mining area of Gansu Province and its associated minerals, three representative samples of kyanite were selected. The kyanite mono-mineral was picked out using the stereobinocular microscope. The properties and composition of kyanite mono-mineral were determined by SY/T 5163-2018 Analysis method for clay minerals and ordinary non-clay minerals in sedimentary rocks by the X-ray diffraction. The kyanite sample was dissolved at low temperature with HF. After decomposition and filtration, the residue was melted with Na2O2 followed by acidification. The solution was transferred into a volumetric flask. A proper volume of solution was sampled and diluted in 25 mL volumetric flask. The medium was 10% nitric acid. Al 308.215 nm was selected as the analytical line. The content of Al2O3 was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to calculate the content of kyanite. Thereby the method for the phase analysis of kyanite in a mining area of Gansu Province by ICP-AES was established. The linear correlation coefficient of Al2O3 calibration curve was 0.999 9. The limit of detection was 0.002 3%, and the limit of quantification was 0.012%. The proposed method was applied for the determination of kyanite in simulated calibration sample. The relative standard deviation (RSD, n=11) was 2.7%, and the spiked recoveries were between 96% and 104%. The analysis results of actual sample were in good agreement with those obtained by the titrimetric method.
谢海东, 鲁海妍, 杨晓文, 余志峰, 方宏树, 孔晓彦. 电感耦合等离子体原子发射光谱法用于甘肃某矿区蓝晶石的物相分析[J]. 冶金分析, 2023, 43(2): 46-53.
XIE Haidong, LU Haiyan, YANG Xiaowen, YU Zhifeng, FANG Hongshu, KONG Xiaoyan. Application of inductively coupled plasma atomic emission spectrometry in phase analysis of kyanite in a mining area of Gansu Province. , 2023, 43(2): 46-53.
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