Molecularly imprinted electroluminescence switch sensor with a dual recognition effect for determination of ultra-trace levels of cobalt (II)
文献类型： 外文期刊
作者： Li, Shuhuai 1 ; Li, Jianping 3 ; Ma, Xionghui 1 ; Pang, Chaohai 1 ; Yin, Guihao 1 ; Luo, Jinhui 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Analysts & Test Ctr, Haikou 571101, Hainan, Peoples R China
2.Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Hainan, Peoples R China
3.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China
关键词： Molecularly-imprinted; Bovine serum albumin-metal; Dual selective; Switch; Electrochemiluminescence
期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：10.618； 五年影响因子：9.323 ）
ISSN： 0956-5663
年卷期： 2019 年 139 卷
页码：
收录情况： SCI
摘要： A dual selection/recognition effect is described for cobalt (II) ions (Co2+). It is based on bovine serum albuminmetal-Co2+ coordination (BSA-Co2+) and the use of a molecularly imprinted polymer (MIP). An electro-chemiluminescence (ECL) switch sensor was designed for detecting nanomolar levels of Co2+. The BSA-Co2+ coordination complex was chosen as a template to prepare a MIP modified switch sensor. The coordination reaction between BSA and Co2+ provides the first step in recognition, and MIP provides the second step for Co2+. This leads to a strong improvement in selectivity of the sensor. A multi-walled carbon nanotube/Cu nanoparticles/carbon quantum dots nanocomposite (MWCNT/Cu/C-dots) acts as an ECL device, and the BSA-Co2+ complex quenches the ECL signal. Therefore, the elution and resorption of BSA Co2+ can be used as a switch to control ECL. Additionally, a method was established to detect Co2+, with the detection limit as low as 3.07 x 10(-10) mol/L. The method was applied to the analysis of spiked environmental water, soil samples, and agricultural products. The recovery rates of the method were in the range of 87.5-111.3%.
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