Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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A Study on Detection Characteristics of Cadmium and Lead for Bi Nanopowder-Labeled Electrode

비스무스 나노분말 표지 전극의 카드뮴/납 검출특성에 관한 연구

  • Lee, Gyeoung-Ja (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Kim, Hyoun-Jin (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Lee, Hi-Min (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Lee, Sang-Hoon (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Lee, Min-Ku (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Lee, Chang-Kyu (Nuclear Materials Research Division, Korea Atomic Energy Research Institute (KAERI))
  • 이경자 (한국원자력연구원 원자력재료연구부) ;
  • 김현진 (한국원자력연구원 원자력재료연구부) ;
  • 이희민 (한국원자력연구원 원자력재료연구부) ;
  • 이상훈 (한국원자력연구원 원자력재료연구부) ;
  • 이민구 (한국원자력연구원 원자력재료연구부) ;
  • 이창규 (한국원자력연구원 원자력재료연구부)
  • Published : 2008.10.28
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Abstract

Trace analysis of Cd and Pb at surface modified thick film graphite electrode with Bi nanopowder has been carried out using square-wave anodic stripping voltammetry (SWASV) technique. Bi nanopowder synthesized by gas condensation (GC) method showed the size of $50{\sim}100$ nm with BET surface area, $A_{BET}=6.8m^{2}g^{-l}$. For a strong adhesion of the Bi nanopowder onto the screen printed carbon paste electrode, nafion solution was added into Bi-containing suspension. From the SWASV, it was found that the Bi nanopowder electrode exhibited a well-defined responses relating to the oxidations of Cd and Pb. The current peak intensity increased with increasing concentration of Cd and Pb. From the linear relationship between Cd/Pb concentrations and peak current, the sensitivity of the Bi nanopowder electrode was quantitatively estimated. The detection limit of the electrode was estimated to be $0.15{\mu}g/l$ and $0.07{\mu}g/l$ for Cd and Pb, respectively, on the basis of the signal-to-noise characteristics (S/N=3) of the response for the $1.0{\mu}g/l$ solution under a 10 min accumulation.

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References

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