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  • 09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제126회 대한화학회 학술발표회 및 총회 Electrochemical detection of redox-free single water droplets in organic solvent

등록일
2020년 9월 17일 14시 12분 48초
접수번호
1128
발표코드
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발표시간
화 09시 : 15분
발표형식
구두발표
발표분야
Electrochemistry - Oral Presentation of Young Scholars in Electrochemistry
저자 및
공동저자
Hyeong kwon Moon, Jun Hui Park*
Department of Chemistry, Chungbuk Natioanl University, Korea
We report the electrochemical detection on water-in-oil emulsion droplet by collision oxidation of AA extracted from continuous phase using a platinum ultramicroelectrode (Pt-UME) without hydrophobic electrolyte. In this experiment, water droplets were prepared by the ultrasonication of organic solvent (e.g., dichloroethane) containing dioctyl sulfosuccinate (AOT) as an emulsifier and aqueous solution containing sodium chloride as a hydrophilic electrolyte. Incubating for few minutes, enough of time to AA be extracted, the spike-shaped current peak resulted from electrochemical reaction of water droplet observed in the chronoamperometry over the oxidative potential of redox species. Single water droplet that collides with the Pt-UME led to amperometric current spike peak due to the instantaneous electrolysis of the redox species. The charge of single collision events was proportional to the droplet size and concentration of redox species. By adjusting the concentration of the AA, the size of single water droplet were estimated. Moreover, the contact area of the droplet can be obtained. We could successfully establish a new pure water droplet detection system in organic solvent.

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