Zhao Yuqi, Liu Ruxin, Cui Xiaoqian, Fu Qingjie, Yu Miao, Fei Qiang, Feng Guodong, Shan Hongyan, Huan Yanfu
College of Chemistry, Jilin University, Changchun, 130023, China.
Department of Emergency and Critical Care, The Second Hospital of Jilin University, Changchun, 130041, China.
Anal Sci. 2020 Oct 10;36(10):1165-1169. doi: 10.2116/analsci.20P035. Epub 2020 Apr 24.
Based on the anti-aggregation mechanism of citrate stabilized gold nanoparticle (AuNPs), a new specific and sensitive colorimetric sensor for thiocyanate (SCN) was developed. In this scheme, the AuNPs were aggregated in the presence of the aggregating agent 2-aminopyridine (2-AP) due to electrostatic attraction. The solution color changed from red to blue. When SCN was present, SCN formed a sulfur-gold bond with the AuNPs to protect the AuNPs from aggregation. Thiocyanate can be detected by the color change of the solution from blue to red. The results showed that the absorbance ratio A/A was linear with the concentration of SCN in the range of 0.4 - 1.2 μmol L by UV-Vis spectroscopy. The limit of detection (LOD) of this assay was 0.37 μmol L. The system also had excellent selectivity and anti-interference ability. In addition, this method was successfully used for the detection of SCN in actual water samples and achieved good results.
基于柠檬酸盐稳定的金纳米颗粒（AuNPs）的抗聚集机制，开发了一种新型的用于检测硫氰酸盐（SCN）的特异性高且灵敏的比色传感器。在此方案中，由于静电吸引，在聚集剂2-氨基吡啶（2-AP）存在的情况下，AuNPs发生聚集。溶液颜色从红色变为蓝色。当存在SCN时，SCN与AuNPs形成硫-金键以保护AuNPs不发生聚集。硫氰酸盐可通过溶液颜色从蓝色变为红色来检测。结果表明，通过紫外-可见光谱法，吸光度比值A/A与SCN浓度在0.4 - 1.2 μmol/L范围内呈线性关系。该检测方法的检测限（LOD）为0.37 μmol/L。该体系还具有出色的选择性和抗干扰能力。此外，该方法成功用于实际水样中SCN的检测并取得了良好结果。
