文献类型：期刊文献

英文题名：Heavy metal ion discrimination based on distinct interaction between single-stranded DNA and methylene blue

作者：Li, Li[1];Liu, Bing[1];Chen, Zhengbo[2]

第一作者：李丽

通讯作者：Chen, ZB[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Peoples R China;[2]Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China.

年份：2019

卷号：11

期号：1

起止页码：17-20

外文期刊名：ANALYTICAL METHODS

收录：;EI(收录号：20185206308514);Scopus(收录号：2-s2.0-85059066055);WOS:【SCI-EXPANDED(收录号:WOS:000454084300002)】；

语种：英文

外文关键词：Aromatic compounds - Color - Colorimetry - Discriminant analysis - Heavy metals - Metal ions

摘要：In this work, we developed a facile and extensible colorimetric sensor array based on different interactions between methylene blue (MB) and single-stranded DNA (ssDNA) for the discrimination of heavy metal ions. Different target metal ions can make MB exhibit diversified color and absorbance changes in the presence of different types of DNA as receptors. Linear discriminant analysis (LDA) results give clear identification of each heavy metal ion on a two-dimensional (2D) spatial dispersion plot. Therefore, a new sensor array composed of three types of ssDNA as receptors and MB as a colorimetric probe is designed for fast discrimination of metal ions, and it achieves accurate discrimination of 9 species of heavy metal ions at 30nM in buffer and tap water samples.