Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Dissolution of vanadium pentoxide using microwave digestion system for determination of vanadium by ICP-AES

ICP-AES로 바나듐 측정을 위한 마이크로파 용해 장치를 이용한 오산화바나듐 용해

  • Choi, Kwang-Soon (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Park, Yang-Soon (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Kim, Yeon-Hee (Panax E-tec) ;
  • Han, Sun-Ho (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Song, Kyu-Seok (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute)
  • 최광순 (한국원자력연구원 원자력화학연구부) ;
  • 박양순 (한국원자력연구원 원자력화학연구부) ;
  • 김연희 (파낙스이텍) ;
  • 한선호 (한국원자력연구원 원자력화학연구부) ;
  • 송규석 (한국원자력연구원 원자력화학연구부)
  • Received : 2010.08.13
  • Accepted : 2010.11.16
  • Published : 2010.12.25
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Abstract

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-$H_2O_2$-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, $H_2O_2$ 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 $97.9{\pm}0.9%$ using an inductively coupled plasma atomic emission spectrometer after dissolution of a sample with the microwave digestion system.

황산 제조 및 그 외에 많은 유기화합물을 산화시키는 촉매제로 널리 이용되고 있는 공업용 오산화바나듐의 용해방법을 연구하였다. 오산화바나듐 시약은 왕수-$H_2O_2$-HF로 완전히 용해되었으나 판상 모양의 오산화바나듐 시료는 혼합산에 완전히 용해되지 않아 시료 전처리 방법을 확립할 필요가 있다. 따라서 본 연구에서는 산 처리법과 용융법을 혼용한 방법 및 마이크로파 용해 장치를 이용한 용해법을 비교 분석하여 바나듐화합물의 용해성을 조사하였다. 바나듐 화합물은 왕수, 플루오르화수소산 및 과산화수소의 혼합산으로 녹이는 것이 최적이었으며, 두 용해 방법 중 마이크로파 용해 장치를 이용한 용해법이 분석의 신속성을 고려하면 보다 유용한 방법으로 판단되었다. 마이크로파 용해 장치로 용해한 다음 유도 결합 플라스마 원자방출분광법으로 측정한 결과 바나듐산화물($V_2O_5$) 함량은 $97.9{\pm}0.9%$이었다.

Keywords

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