대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제28권11호
  • /
  • Pages.1148-1153
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  • 2006
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
권호 표지

이온 선택성 미소전극과 전위계를 이용한 신호 계측 시스템의 특성 평가

Characterization of Signal Measuring System Using ion Selective Microelectrode and Electrometer

  • 전효용 (부산대학교 환경공학과) ;
  • 선경숙 (부산대학교 환경공학과) ;
  • 박정진 (부산대학교 환경공학과) ;
  • 변임규 (부산대 환경기술산업개발연구센터) ;
  • 박태주 (부산대학교 환경공학과)
  • Jun, Hyo-Yong (Department of Environmental Engineering, Pusan National University) ;
  • Seon, Kyeong-Suk (Department of Environmental Engineering, Pusan National University) ;
  • Park, Jeung-Jin (Department of Environmental Engineering, Pusan National University) ;
  • Byun, Im-Gyu (Institute for Environmental Technology and Industry, Pusan National University) ;
  • Park, Tae-Joo (Department of Environmental Engineering, Pusan National University)
  • 발행 : 2006.11.30
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초록

이온 선택성 미소전극과 전위계를 이용하여 생물막내 이온 농도 측정을 위한 신호 계측 시스템을 구성하였다. 제작된 신호 계측 시스템의 성능과 적용성을 평가하기 위하여 보정곡선의 기울기, 검출한계, 시간경과에 따른 응답신호의 변화, 전위차 선택계수를 조사하였다. 보정곡선의 기울기는 목적이온 농도에 밀접한 비례관계를 나타내었다. 신호 계측 시스템은 $10{\mu}M$ 이하의 낮은 검출한계를 가졌으며, 실험에 사용된 방해이온에 민감하지 않았다. 본 연구에서 제작된 전위계는 상용되는 전위계와의 성능을 비교하였을 때 보정곡선 기울기, 검출한계, 응답시간에서 비슷한 경향을 나타내었다. 본 연구에서 제작된 신호 계측 시스템은 생물막내 이온농토 측정 연구를 위한 경제적이며 신뢰성 있는 시스템으로 사용될 수 있을 것이다.

Signal measuring system to analyze ion concentrations in biofilm was constructed with ion selective microeleclrode and electrometer. In order to evaluate the performance and applicability of signal measuring system, the following characteristics, such as slope of calibration curve, detection limit, variation of response according to the time, and potentiometric selectivity coefficient, were investigated. The slope of calibration curve showed high degree of association for primary ion concentration. The response of the system was log-linear in standard solution down to $10{\mu}M$ and signal measuring system was not sensitive for interfering ions. In comparison with commercial electrometer, the fabricated electrometer system had similar tendencies for the slope of calibration curve, detection limit, and response time. Therefore the signal measuring system could be used to investigate ion profiles in biofilm as a cost effective and reliable measuring system.

키워드

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