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GAN Ke, ZHAO Hui, WANG Hai-ying, WANG Chao-yuan, LIANG Xiao-sheng. Determination of microcystins by electrode modified with bi-modified gold nanoparticles with mono-6-thio-β-cyclodextrin and thiol phosphate modification[J]. Science and Technology of Food Industry, 2016, (04): 49-52. doi: 10.13386/j.issn1002-0306.2016.04.001
Citation: GAN Ke, ZHAO Hui, WANG Hai-ying, WANG Chao-yuan, LIANG Xiao-sheng. Determination of microcystins by electrode modified with bi-modified gold nanoparticles with mono-6-thio-β-cyclodextrin and thiol phosphate modification[J]. Science and Technology of Food Industry, 2016, (04): 49-52. doi: 10.13386/j.issn1002-0306.2016.04.001

Determination of microcystins by electrode modified with bi-modified gold nanoparticles with mono-6-thio-β-cyclodextrin and thiol phosphate modification

doi: 10.13386/j.issn1002-0306.2016.04.001
  • Received Date: 2015-05-29
  • In order to determinate microcystins fast and sensitively,an electrochemistry determination method of differential pulse voltammetry was established with bi- modified gold nanoparticles. The bi- modified gold nanoparticles were prepared by modifying gold nanoparticles with mono- 6- thio- β- cyclodextrin and thiol phosphate based on the structural characteristics of microcystins. The bi-modified gold nanoparticles had an absorbance capability of 2.125 μg/m L and a static allocation coefficient of 5.67,respectively. Then microcystin was determined with the electrochemical sensor prepared with a glassy carbon electrode which modified with toluylene red polymer to get a positive charged surface for absorbing the bi-modified gold nanoparticles. The result showed that this method had a strong resisting interference ability with a linear range of determination from 26 nmol/L to 213 μmol/L and a detection limit of 19 nmol/L,respectively.
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