Determination of trace sulfur and phosphorus in wolframite concentrate by inductively coupled plasma atomic emission spectrometry
GAO Xiao-fei, NI Wen-shan, YAO Ming-xing, Li Xianzhen
1. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou 450006, China;
2. China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China
Abstract：Under the optical experiment conditions，the spectral line of 178.221nm and 180.669 nm in ultraviolet band were selected as analytical lines of sulfur and phosphorus respectively, and sulfur and phosphorus in wolframite concentrate were determined simultaneously by inductively coupled plasma atomic emission spectrometry with sodium peroside as flux for melting mining sample at high temperature and tartaric acid as extractant. Tartaric acid was added for the complexation of tungsten in order to avoid the adsorption of sulfur and phosphors by large amount of tungstic acid precipitates which generated in acid condition. The matrix effect produced by tungsten, iron, silicon, manganese and calcium were overcome by selection of relatively low observation height and matrix matching method. The detection limit of sulfur and phosphorous was 0.007 0 mg/L and 0.004 8 mg/L,respectively, and the linear range was the same as 0.01-100 μg/mL. The proposed method was applied for the determination of certified reference materials, and the determination results were consistent with the certified value. The relative standard deviations (RSDs) for sample analysis results were 1.7%-2.8%.
高小飞，倪文山，姚明星，李贤珍 . 电感耦合等离子体原子发射光谱法测定黑钨精矿中痕量硫磷[J]. 冶金分析, 2012, 32(6): 30-33.
GAO Xiao-fei, NI Wen-shan, YAO Ming-xing, Li Xianzhen. Determination of trace sulfur and phosphorus in wolframite concentrate by inductively coupled plasma atomic emission spectrometry. , 2012, 32(6): 30-33.
