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OALib Journal期刊
ISSN: 2333-9721
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基于分子印迹电聚合膜的褪黑素传感器的研究
DOI: 10.3724/SP.J.1096.2012.11115, PP. 1219-1224
Keywords: 分子印迹,褪黑素,电聚合,电化学传感器
Abstract:
在弱酸条件下,以邻苯二胺为功能单体,褪黑素为模板,以电化学聚合物法在铂电极表面合成了性能稳定的褪黑素分子印迹聚合物膜。采用循环伏安法(CV)和差分脉冲法(DPV)对分子印迹传感器的识别性能进行了研究。结果表明:此传感器对褪黑素具有快的响应、良好的选择性和高的灵敏度。以K3Fe(CN)6为电子传递媒介,建立了一种差分脉冲伏安法(DPV)间接检测褪黑素的分析方法。在1×1010-1×108moL/L范围内,褪黑素的浓度与K3Fe(CN)6的相对峰电流变化呈良好的线性关系;检出限为1×1011mol/L(S/N＝3)。将此传感器应用于复合褪黑素及尿样中褪黑素含量的测定,加标平均回收率大于94%。
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