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학술발표회초록보기

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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Sequential colorimetric detection technology of iron and mercury ions by etching and aggregation of gold nanorods

등록일
2017년 7월 31일 09시 28분 54초
접수번호
3004
발표코드
ANAL1.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 09시 : 26분
발표형식
구두발표
발표분야
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
공동저자
Sujin Yoon, Yun Sik Nam, Kang-Bong Lee1,*
Advanced Analysis Center, Korea Institute of Science and Technology, Korea
1Green City Technology Institute, Korea Institute of Science and Technology, Korea
A simple and sensitive colorimetric assay method for the sequential determination of iron ions and mercury in aqueous samples was developed using label free gold nanorods. Iron ions etched gold nanorods, and mercury ions bond these gold nanorods together. This sequential react results in a dramatic color change from red to blue and finally back to red. Therefore, the concentration of iron ions and mercury ions in environmental samples can be quantitatively detected by the naked eye or by UV-Vis spectrometry when using the AuNRs sensor. The sensitivity of the detection is significantly improved by modulating the solution to pH 7, leading to a more rapid color change in the optimized AuNRs system. The absorption ratios (A640/A740) of the modified AuNRs solution exhibited a linear correlation with the iron ion concentrations. The absorption ratios (A550/A640) of the modified AuNRs solution exhibited a linear correlation with the mercury ion concentrations, with a limit of detection of 25.2 nM. This cost-effective detection system allows for the rapid and facile determination of the concentration of iron ions and mercury ions in aqueous samples.

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