Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing, 401331, China.
Mikrochim Acta. 2018 Jan 29;185(2):143. doi: 10.1007/s00604-018-2701-1.
The authors report that sulfide ions are capable of inhibiting the peroxidase-like activity of copper nanoclusters (CuNCs). The catalytic activity of CuNCs toward the oxidation of the chromogenic substrate 3,3',5,5'-tetramethylbenzidine by HO is remarkably decreased in the presence of sulfide. Based on this finding, a colorimetric assay was developed for the rapid determination of sulfide. Best operated at a wavelength of 652 nm, it has a 0.5 μM detection limit. The method is highly selective and has been successfully applied to the quantification of sulfide in environmental water samples. Graphical abstract The catalytic activity of CuNCs toward the oxidation of 3,3',5,5'-tetramethylbenzidine by HO is remarkably decreased in the presence of sulfide ions. This finding has been applied to design a method for colorimetric quantification of sulfide ions in environmental samples.
作者报告称，硫离子能够抑制铜纳米簇（CuNCs）的过氧化物酶样活性。在硫存在的情况下，CuNCs 对 HO 氧化显色底物 3,3',5,5'-四甲基联苯胺的催化活性显著降低。基于这一发现，开发了一种用于快速测定硫化物的比色分析方法。该方法在 652nm 处最佳操作，检测限为 0.5μM。该方法具有高度选择性，并已成功应用于环境水样中硫化物的定量分析。
图摘要
在硫离子存在的情况下，CuNCs 对 HO 氧化 3,3',5,5'-四甲基联苯胺的催化活性显著降低。这一发现已被应用于设计一种用于环境样品中硫化物离子比色定量的方法。
