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石墨烯修饰电极分子印迹电化学传感器的研制及其对多巴胺的测定
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作者单位
王丹丹,曾延波,刘海清,尹争志,李蕾 1.常州大学化学与化工学院2.嘉兴学院生物与化学工程学院 
基金项目:国家自然科学基金资助项目(21177049,51103063);浙江省自然科学基金资助项目(Y4110545,LQ12B05005)
中文摘要:以石墨烯为电极增敏材料,多巴胺印迹聚合物为特异性识别材料,采用滴涂法组装石墨烯修饰电极的分子印迹电化学传感器。考察了pH值、石墨烯浓度、印迹聚合物浓度对传感器的影响,优化的实验条件为:pH 7.0,石墨烯浓度为0.5 g/L,印迹聚合物浓度为20 g/L。实验表明,该印迹传感器对多巴胺的响应电流远大于非印迹电极,同时该印迹传感器对多巴胺具有较好的选择性,检测范围为2.0×10-7~1.0×10-4 mol/L,检出限(S/N=3)为6.8×10-8 mol/L。该传感器用于盐酸多巴胺注射液的测定,其回收率为98%~105%。
中文关键词:石墨烯  多巴胺  分子印迹聚合物  电化学传感器
 
Preparation of A Sensor Based on Graphene Modified Electrode and Molecularly Imprinted Polymers and Its Determination on Dopamine
Abstract:An electrochemical sensor based on dropped molecular imprinted polymers(MIPs) suspension for dopamine was fabricated.Influences of pH value,concentrations of graphene and MIPs were also optimized.The optimal conditions were as follows:pH value:7.0,concentration of graphene:0.5 g/L,concentration of MIPs:20 g/L.Under the optimal conditions,the prepared sensor showed good selectivity and high sensitivity for dopamine.The DPV peak current is linear to the DA concentration in the range of 2.0×10-7-1.0×10-4 mol/L,with a detection limit(S/N=3) of 6.8×10-8 mol/L.The prepared sensor was successfully applied in the determination of dopamine hydrochloride with recoveries of 98%-105%.
Key Words:graphene  dopamine  molecular imprinted polymers(MIPs)  electrochemical sensor
引用本文:王丹丹,曾延波,刘海清,尹争志,李蕾.石墨烯修饰电极分子印迹电化学传感器的研制及其对多巴胺的测定[J].分析测试学报,2013,32(5):581-585.
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