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学科主题: 物理化学
题名: Colorimetric sensing of anions in water using ratiometric indicator-displacement assay
作者: Feng, Liang1;  Li, Hui1;  Li, Xiao1;  Chen, Liang1;  Shen, Zheng1;  Guan, Yafeng1
通讯作者: 冯亮 ;  关亚风
关键词: Colorimetric anion sensing ;  Ratiometric ;  Indicator-displacement assay ;  Principal component analysis ;  Hierarchical clustering analysis
刊名: ANALYTICA CHIMICA ACTA
发表日期: 2012-09-19
DOI: 10.1016/j.aca.2012.06.041
卷: 743, 页:1-8
收录类别: SCI
文章类型: Article
部门归属: 1
项目归属: 105
产权排名: 1,1
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: The analysis of anions in water presents a difficult challenge due to their low charge-to-radius ratio, and the ability to discriminate among similar anions often remains problematic. The use of a 3 x 6 ratiometric indicator-displacement assay (RIDA) array for the colorimetric detection and identification of ten anions in water is reported. The sensor array consists of different combinations of colorimetric indicators and metal cations. The colorimetric indicators chelate with metal cations, forming the color changes. Upon the addition of anions, anions compete with the indicator ligands according to solubility product constants (K-sp). The indicator-metal chelate compound changes color back dramatically when the competition of anions wins. The color changes of the RIDA array were used as a digital representation of the array response and analyzed with standard statistical methods, including principal component analysis and hierarchical clustering analysis. No confusion or errors in classification by hierarchical clustering analysis were observed in 44 trials. The limit of detection was calculated approximately, and most limits of detections of anions are well below mu M level using our RIDA array. The pH effect, temperature influence, interfering anions were also investigated, and the RIDA array shows the feasibility of real sample testing. (C) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: ION-SELECTIVE ELECTRODES ;  ALPHA-AMINO-ACIDS ;  ENANTIOMERIC EXCESS ;  SENSOR ARRAY ;  RECOGNITION ;  NOSE
语种: 英语
WOS记录号: WOS:000308054100001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118315
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Lab Instrumentat & Analyt Chem, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Feng, Liang,Li, Hui,Li, Xiao,et al. Colorimetric sensing of anions in water using ratiometric indicator-displacement assay[J]. ANALYTICA CHIMICA ACTA,2012,743:1-8.
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