检出限
石墨烯
抗坏血酸
电化学
线性范围
复合数
纳米颗粒
化学
氧化物
电极
材料科学
核化学
化学工程
纳米技术
色谱法
复合材料
有机化学
物理化学
工程类
食品科学
作者
Kunlei Zhang,Kun Dai,Ruyan Bai,Yuchan Ma,Yan Deng,Delei Li,Xi Zhang,Rong Hu,Yunhui Yang
标识
DOI:10.1016/j.cclet.2018.10.021
摘要
An electrochemical immunosensor was developed for ultrasensitive detection of microcystin-LR in water. MIL-101, a porous metal-organic frameworks (MOFs) material based on trivalent chromium skeleton were synthesized by hydrothermal synthesis method, and loaded with Au nanoparticles (Au NPs) to prepare Au [email protected] composite materials which were used as a marker to label anti microcystin-LR (Anti-MC-LR). The composite materials have strong catalytic properties to the oxidation of ascorbic acid. Anti-MC-LR was immobilized on glassy carbon electrode surface using electrodeposition graphene oxide (GO) as an immobilization matrix to construct a competitive microcystin-LR immunosensor. The electrochemical immunosensor display linear relationship in the range of 0.05 ng/mL−75 μg/mL with linear correlation coefficient of 0.9951 and detection limit of 0.02 ng/mL (S/N = 3). This sensor was used to detect microcystin-LR in the water sample. The recovery was 102.43%, which is satisfied. The good testing results indicate the sensor has a great prospect in practical application.
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