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Spectrophotometric Determination of Molybdenum in the Ammonia Leaching Residue Using Thiocyanate
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    Abstract:

    The ammonia leaching residue sample was dissolved by HNO3-H2SO4-H3PO4 mixed acid and separated by NaOH. With Cu2+ and 2 mol/L H2SO4, Mo(VI) was reduced to Mo(V) by thiourea, then reacted with thiocyanate to form amber complexes which was used for the determination of Mo by spectrophotometric method. The sample digestion method, co-existence elements interference and their elimination were studied. The 8-time experimental results of the same samples by the proposed method were compared with that of gravimetric method and full-differential spectrophotometric method. The results indicate that the proposed method is simple, accurate and high-precision, and fit to the determination of Mo in ammonia leaching residue with satisfactory effects, prior to gravimetric method.

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[Sun Baolian, Li Bo, Wang Guodong, Yang Pingping. Spectrophotometric Determination of Molybdenum in the Ammonia Leaching Residue Using Thiocyanate[J]. Rare Metal Materials and Engineering,2009,38(12):2253~2256.]
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History
  • Received:June 02,2009
  • Revised:July 27,2009