Detection of glyphosate by quantitative analysis of fluorescence and single DNA using DNA-labeled fluorescent magnetic core-shell nanoparticles
- Authors
- Lee, Hee Uk; Jung, Da Un; Lee, Ja Hyun; Song, Yoon Seok; Park, Chulhwan; Kim, Seung Wook
- Issue Date
- 2월-2013
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Immunosensor; Glyphosate; Fluorescence; Quantitative analysis; Water-in-oil; Magnetic nanoparticle
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.177, pp.879 - 886
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 177
- Start Page
- 879
- End Page
- 886
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/104127
- DOI
- 10.1016/j.snb.2012.11.075
- ISSN
- 0925-4005
- Abstract
- Biosensors based on antibody recognition have a wide range of monitoring applications with applications to environmental and food problems. In an effort to improve the limit of detection, novel Co-B/SiO2/dye nanoparticles were prepared in a water-in-oil microemulsion and subsequently surface modified. The fluorescence magnetic nanoparticle (FMP) based detection method for quantitatively fluorescence intensity and specific DNA-based application is described. A sandwich format consisting of conjugated glyphosate-double target/probe DNA-FMP was fabricated. Results were measured based on the fluorescence intensity obtained by comparing the free glyphosates at concentrations of 1-10,000 nM for detecting the binding of glyphosate-double DNA-FMP nanoparticles. Moreover, quantitative information concerning the free glyphosate analysis was translated into a single probe DNA signal with a good linear correlation in the concentration range of 1-10,000 nM (R-2 = 0.98) and a limit of detection of 0.27 nM. Therefore, detection of glyphosate could easily and quantitatively be measured using confocal laser scanning microscopy and low-cost UV photometric analysis. These results indicate that this method is a very simple and economic strategy for detecting glyphosate. (c) 2012 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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