Combined Determination of Phosphorus and Arsenic in Molybdenum Concentrate by Molybdenum Blue Spectrophotometric Method

Abstract:

This paper determined the total absorbance of phosphorus molybdenum blue and arsenic molybdenum blue by using the additive property of their absorbance values. By eliminating the interference of arsenic by reduction masking with composite reducing agent Na₂SO₃-Na₂S₂O₃-KBr, the absorbance of phosphorus could be obtained. Thus, the content of phosphorus and arsenic could be calculated, respectively. The results show that the work curves of this method for phosphorus and arsenic are consistent with Beer’s law when the content of phosphorus and arsenic is 0-0.60ug/mL and 0-2.00ug/mL, respectively. The standard addition recovery rate of phosphorus and arsenic is 98.80%-101.04% and 99.00%-101.50%, respectively. The relative standard deviation of phosphorus and arsenic is less than 4.0% with good accuracy and precision. This method is simple and fast to determine phosphorus and arsenic in molybdenum concentrate, and the results are accurate and reliable.

• Periodical: Advanced Materials Research (Volumes 1033-1034)
• Pages: 521-525
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.521
• Online since: October 2014
• Authors: Cheng Ying Zhou*, Wei Qu, Liu Lu Cai
• Keywords: Arsenic, Combined Determination, Molybdenum Concentrate, Phosphorus, Spectrophotometry

References

[1] Huaying Tang: Metallurgical Analysis Vol. 16 (1996), pp.45-46, in Chinese.

[2] Penghui Wang: Yunnan Metallurgy Vol. 30 (2001), pp.44-45, in Chinese.

[3] Fengju Jiao and Guiqin Gao: Metallurgical Analysis Vol. 29 (2009), pp.73-75, in Chinese.

[4] Yukui Wang: Zhaoyan Jixie Qidong Gongju (2007), pp.41-44, in Chinese.

[5] Huaying Tang: Ferro-alloys (1995), pp.50-54, in Chinese.

[6] Xiaolan Xie, Zhimin Jiao, Xiaoya Ma and Yanjing Ma: Science & Technology Information (2013), p.403, in Chinese.

[7] De Chen: Metallurgical Analysis Vol. 28 (2008), pp.807-810, in Chinese.