A colorimetric indicator-displacement assay array for selective detection and identification of biological thiols

作者：Qian Sihua; Lin Hengwei^*

来源：Analytical and Bioanalytical Chemistry, 2014, 406(7): 1903-1908.

DOI：10.1007/s00216-013-7591-9

• Colorimetric sensor array
• Biothiols
• Indicator-displacement assay
• Hierarchical clustering analysis

A simple, inexpensive yet highly selective colorimetric indicator-displacement assay array for the simultaneous detection and identification of three important biothiols at micromolar concentrations under physiological conditions and in real samples has been developed in this work. With use of an array composed of metal indicators and metal ions, clear differentiation among cysteine, homocysteine and glutathione was achieved. On the basis of the colour change of the array, quantification of each analyte was accomplished easily, and different biothiols were identified readily using standard chemometric approaches (hierarchical clustering analysis). Moreover, the colorimetric sensor array was not responsive to changes with 19 other natural amino acids, and it showed excellent reproducibility. Importantly, the sensor array developed was successfully applied to the determination and identification of the three biothiols in a real biological sample.

• 出版日期2014-3
• 单位中国科学院宁波材料技术与工程研究所