Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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A rapid determination of chloride in saturated paste extracts of salt-affected soils using EC change upon AgCl precipitation

AgCl 침전 전후 전기전도도 변화를 이용한 염해지 포화침출액의 염소 이온 신속 정량

  • Lee, Yehun (Department of Environmental and Biological Chemistry, Chungbuk National University) ;
  • Kim, Jeeyoon (Department of Environmental and Biological Chemistry, Chungbuk National University) ;
  • Lee, Jeongsu (Department of Environmental and Biological Chemistry, Chungbuk National University) ;
  • Pros, Khok (Department of Environmental and Biological Chemistry, Chungbuk National University) ;
  • Park, Jee Won (Technel Co., Ltd) ;
  • Han, Gwang Hyun (Department of Environmental and Biological Chemistry, Chungbuk National University)
  • Received : 2017.07.27
  • Accepted : 2017.09.03
  • Published : 2017.09.29
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Abstract

Chloride is known as the most important anion in salt-affected soils. We observed the degree of EC change upon AgCl precipitation was quantitatively related with the chloride concentration. Method validation and intercomparison with ion chromatography revealed the proposed method can provide rapid and moderately precise chloride concentrations in salt-affected soils.

염해토양에서 염소이온은 작물에 대한 독성이 가장 큰 음이온이다. 일반적으로, 이온 크로마토그래피와 전위차 적정법 등 정밀한 기기분석이 염소이온 분석에 이용되고 있으나, 본 연구에서는 간단한 EC 메터를 이용해 신속히 그리고 비교적 정밀하게 염해지 염소이온이 정량 가능하다는 것을 확인하였다. $Cl^-$이 AgCl로 침전될 때 수반되는 전기전도도 변화도(dEC)는 염소이온 농도와 매우 직선적인 비례 관계가 있었으며, 감도, 검량 구간, 정량한계, 정밀도 및 분석 적응성 모두 양호한 것으로 조사되었다. 또한, 이 Ag-dEC법으로 분석된 전남 고흥군 간척지 일원 토양침출액의 염소이온 농도는 이온 크로마토그래피의 분석결과와 매우 잘 일치하였다.

Keywords

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