Determination of Arsenic Content in Neodymium Oxideby Inductively Coupled Plasma Mass Spectrometry
Received:October 25, 2017  Revised:January 08, 2018
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DOI:doi:10.3969/j.issn.2095-1035.2018.02.002
KeyWord:inductively coupled plasma mass spectrometry; Neodymium oxide; arsenic
     
AuthorInstitution
ZHANG Li-feng 稀土冶金及功能材料国家工程研究中心;、包头稀土研究院
ZHOU Kai-hong 稀土冶金及功能材料国家工程研究中心
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Abstract:
      The method is established that to use oxalate precipitate separate from neodymium oxide and to eliminate the double charge ion interference that residual neodymium ions generated by the correction equation. Determination of arsenic content by inductively coupled plasma mass spectrometry. The selection of dissolved sample condition, the dissolved sample is used to nitric acid can meet the test requirements. The instrument condition was optimized, the power was 1500W, and the flow of atomizer was 0.86 L/min. The selection of the internal standard element is carried out, and the Rh is the best calibrated inner standard element. It is determined that the substrate is separated by oxalic acid and the neodymium"s double charge ion is eliminated by interference correction equation. The detection limit is 0.029 ng/mL, and the quantitative limit is 0.097 ng/mL. The method was used to measure the actual sample, the recoveries (n = 11) is 94% ~ 104%, and the relative standard deviation (RSD, n = 11) is 0.56% ~ 5.82%.
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