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KMID : 0385520100230060511
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Analytical Science & Technology
2010 Volume.23 No. 6 p.511 ~ p.514
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Dissolution of vanadium pentoxide using microwave digestion system for determination of vanadium by ICP-AES
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Choi Kwang-Soon
Park Yang-Soon
Kim Yeon-Hee
Han Sun-Ho
Song Kyu-Seok
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Abstract
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Dissolution procedure of vanadium pentoxide, which is widely used as a catalyst for production of sulfuric acid or an oxide reaction of the numerous organic compounds, was investigated. Reagent of vanadium pentoxide was completely dissolved in aqua regia-H₂O₂-HF solution, but plate type of vanadium pentoxide sample was not clearly dissolved with mixed acids. Thus, in order to establish the dissolution procedure for plate type of vanadium pentoxide, the solubility of vanadium pentoxide was investigated through comparison of acid treatment-fusion and microwave digestion methods. The optimized acid for dissolution of vanadium compound was found to be mixing acids of aqua regia, H₂O₂ and HF. Acid-fusion and microwave digestion methods have a similar property in the solubility of vanadium compound, but the latter was more quick and convenient procedure. The content of vanadium pentoxide was found to be 97.9±0.9% using an inductively coupled plasma atomic emission spectrometer after dissolution of a sample with the microwave digestion system.
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KEYWORD
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Vanadium pentoxide, microwave digestion system, acid-fusion, ICP-AES
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