Electrochemical Properties of Biosensor with Butyl Rubber Binder

부틸고무를 결합재로 사용한 바이오센서의 전기화학적 성질

  • Published : 2006.12.30

Abstract

An enzyme electrode bound by butyl rubber was newly constructed for the determination of hydrogen peroxide and for the practical application as a biosensor. Then its electrochemical properties were investigated. It produced a hundreds-fold increased signal compared to the plant or animal tissue based biosensor studied previously and could be run at between $0.0{\sim}-1.00\;V$(vs. Ag/AgCl). The relationship between signal and electrode potential was linear in the experimental range of potential. It showed a detection limit of $3.0{\times}10^{-4}\;M$ and a very good linearity of Lineweaver-Burk plot giving the proof of a good enzyme immobilization. Especially, both the reproducibility of signal current due to its high sensitivity and mechanical stability presented a new possibility for the practical use of biosensor bound with butyl rubber.

부틸고무를 결합재로 사용하여 과산화수소 정량 바이오센서를 제작하고, 그것의 전기화학적 특성과 실용화 가능성을 살펴보았다. 전극은 본 실험실에서 연구되었던 실리콘 오일을 결합재로 사용한 동식물조직 바이오센서보다 수백 배 이상 큰 신호를 보여주었으며, $0.0{\sim}-1.00\;V$(vs. Ag/AgCl)의 넓은 퍼텐셜 영역에서 안정적으로 작동될 수 있었다. 또 신호전류는 실험 퍼텔셜 영역에서 전극전위에 따라 좋은 직선성을 보였다. 검출한계는 $3.0{\times}10^{-4}\;M$ 이었으며, Lineweaver-Burk 도시의 직선성은 효소가 전극 표면에 효과적으로 고정되어 있음을 확인시켜 주었다. 높은 감도에 의한 신호전류의 재현성과, 부틸고무의 결합력에 의한 전극물질의 기계적 안정성은 전극의 실용화 가능성을 보여 주었다.

Keywords

References

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