Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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A Strip Sensor Based on PbO2/Carbon Paste Electrode to Determine Sweetener Contents in Fruits

이산화납/탄소 반죽 전극을 이용한 과당 농도 측정 스트립센서

  • Lee, Jae Seon (Department of Chemistry, Kwangwoon University) ;
  • Cho, Joo Young (Department of Chemistry, Kwangwoon University) ;
  • Heo, Min (Department of Chemistry, Kwangwoon University) ;
  • Lim, Woo-Jin (Department of Plant and Environmental Science, Hankyong National University) ;
  • Lee, Sang Eun (Department of Plant and Environmental Science, Hankyong National University) ;
  • Nam, Hakhyun (Department of Chemistry, Kwangwoon University) ;
  • Cha, Geun Sig (Department of Chemistry, Kwangwoon University) ;
  • Shin, Jae Ho (Department of Chemistry, Kwangwoon University)
  • 이재선 (광운대학교 자연과학대학 화학과) ;
  • 조주영 (광운대학교 자연과학대학 화학과) ;
  • 허민 (광운대학교 자연과학대학 화학과) ;
  • 임우진 (한경대학교 농생명과학대학 식물생명환경과학과) ;
  • 이상은 (한경대학교 농생명과학대학 식물생명환경과학과) ;
  • 남학현 (광운대학교 자연과학대학 화학과) ;
  • 차근식 (광운대학교 자연과학대학 화학과) ;
  • 신재호 (광운대학교 자연과학대학 화학과)
  • Received : 2014.05.08
  • Accepted : 2014.05.20
  • Published : 2014.05.31
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Abstract

A strip sensor based on $PbO_2$/carbon paste electrode was prepared by a screen-printing method, and employed to electrochemically determine the concentration of fruit sweeteners(i.e. glucose, sucrose, and fructose). The $PbO_2$/carbon paste electrode could monitor electrocatalytic oxidation of organic compounds such as carbohydrates, and measure the levels of natural sweeteners without enzyme. Severe interference from ascorbic acid was effectively reduced by modifying the electrode surface with a Nafion membrane. The response level of the Nafion/$PbO_2$/carbon paste electrode increased in the order of fructose, sucrose, and glucose, which corresponds to the order of sweetness perceived by humans.

본 연구에서는 스크린 프린팅 방법을 이용하여 이산화납($PbO_2$)/탄소 반죽 전극을 제작하고, 이를 전기화학 방법의 과일 천연당(포도당, 자당, 과당) 측정용 센서로 이용하였다. 이산화납/탄소 반죽전극은 탄수화물과 같은 유기화합물의 전기화학적 산화촉매 신호를 측정함으로써 효소를 사용하지 않고도 당의 측정이 가능하다. 또한 측정 시 심각한 방해작용을 하는 아스코르브산(ascorbic acid)은 Nafion 막을 전극표면에 도입함으로써 효과적으로 감소시켰다. 최적화된 Nafion/이산화납/탄소 반죽 전극은 사람이 느끼는 상대당도(과당>자당>포도당)와 유사하게 각 당에 대한 감응신호를 나타내었다.

Keywords

References

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