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广西科技大学 生物与化学工程学院 广西糖资源绿色加工重点实验室,广西 柳州 545006
李利军,博士,教授,研究方向:电化学分析,E-mail:gxustllj@163.com
收稿日期:2025-04-30,
修回日期:2025-05-20,
录用日期:2025-05-22,
纸质出版日期:2025-07-15
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张越,刘柳,李利军.高灵敏度诺氟沙星分子印迹纳米电化学传感器的制备及应用[J].分析测试学报,2025,44(07):1385-1391.
ZHANG Yue,LIU Liu,LI Li-jun.Preparation and Application of a Highly Sensitive Norfloxacin Molecularly Imprinted Nanoelectrochemical Sensor[J].Journal of Instrumental Analysis,2025,44(07):1385-1391.
张越,刘柳,李利军.高灵敏度诺氟沙星分子印迹纳米电化学传感器的制备及应用[J].分析测试学报,2025,44(07):1385-1391. DOI: 10.12452/j.fxcsxb.250430335.
ZHANG Yue,LIU Liu,LI Li-jun.Preparation and Application of a Highly Sensitive Norfloxacin Molecularly Imprinted Nanoelectrochemical Sensor[J].Journal of Instrumental Analysis,2025,44(07):1385-1391. DOI: 10.12452/j.fxcsxb.250430335.
采用循环伏安法在玻碳电极(GCE)表面修饰金纳米颗粒(AuNPs),得到修饰电极GCE-AuNPs。以诺氟沙星(NOFX)为模板分子,吡咯(Py)和邻苯二胺(OPD)作为双功能单体,利用电聚合在GCE-AuNPs上制备NOFX分子印迹膜,构建了NOFX的电化学传感器(MIP/GCE-AuNPs)。分别使用扫描电镜(SEM)、X-射线衍射(XRD)及系列电化学方法进行表征。以Fe(CN)
6
4-
/Fe(CN)
6
3-
作为电化学探针,考察了该传感器的相关性能。结果表明,该传感器的电流值(
∆I
)与NOFX浓度分别在0.01~5.0 μmol/L和5.0~60 μmol/L范围内呈良好的线性关系,检出限(LOD)为3.3 nmol/L,且具有较强的选择性。该传感器用于实际样品检测,加标回收率为94.0%~111%,相对标准偏差为2.4%~3.1%。
Gold nanoparticles(AuNPs) were deposited on the surface of a glassy carbon electrode(GCE) via cyclic voltammetry to fabricate a GCE-AuNPs modified electrode in this paper. With norfloxacin(NOFX) as the template molecule,pyrrole(Py) and
o
-phenylenediamine(OPD) as bi-functional monomers,NOFX molecular-imprinted membranes were prepared on the GCE-AuNPs through electropolymerization,and an electrochemical sensor for NOFX(MIP/GCE-AuNPs) was constructed. The sensor was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD) and a series of electrochemical methods. Using Fe(CN)
6
4-
/Fe(CN)
6
3-
as an electrochemical probe,the relevant performance of the sensor was investigated. The results showed that the current value(
∆I
) of the sensor had a good linear relationship with the NOFX concentration in the range of 0.01-5.0 μmol/L and 5.0-60 μmol/L,respectively. The detection limit(LOD) was 3.3 nmol/L,and the sensor had strong selectivity. The sensor was applied to the detection of actual samples. The recoveries were 94.0%-111%,with the relative standard deviations of 2.4%-3.1%.
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