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LI Xian-zhen, GAO Xiao-fei, YAO Ming-xing, NI Wen-shan, MAO Xiang-ju. Determination of Mn in Black Tungsten Concentration and Middling Products by Inductively Coupled Plasma-Atomic Emission Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(3): 438-441.
Citation: LI Xian-zhen, GAO Xiao-fei, YAO Ming-xing, NI Wen-shan, MAO Xiang-ju. Determination of Mn in Black Tungsten Concentration and Middling Products by Inductively Coupled Plasma-Atomic Emission Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(3): 438-441.
shu

Determination of Mn in Black Tungsten Concentration and Middling Products by Inductively Coupled Plasma-Atomic Emission Spectrometry

  • 1.

    Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China

  • 2.

    Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China

  • 3.

    Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China

  • 4.

    Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China

  • 5.

    Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China

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  • Received Date: March 04, 2012
  • Revised Date: April 15, 2012
    Abstract
  • A simple, rapid and interference-free method of Na2O2 ore fusion and complexometric extraction with tartaric acid is proposed for the determination of manganese (Mn) in black tungsten concentration and middling by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The precipitation of tungstic acid was successfully avoided by this preparation method, which resolved problems such as incomplete ore digestion and encapsulation/adsorption of the target elements. Under the optimized conditions, the detection limit (LOD) for this method was 0.019 g/mL with relative standard deviations (RSD, n=11) in the range of 0.92%-1.50%. Moreover, good recoveries were obtained (97.5%-104.0%). The deviation between a single determination result and a certification result was much lower than the allowable deviation of national standards with ferrous ammonium sulfate (GB/T 6150.14—2008) between laboratories. This method met the requirements of national standards for the accurate determination of Mn in black tungsten concentration and middling.
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