分子印迹电化学传感器检测环境中特丁津研究
A Molecularly Imprinted Polymers Electrochemical Sensor for Determination of Terbuthylazine in Environmental Samples
查看参考文献18篇
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文摘
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除草剂在水体、土壤、大气等环境介质中的残留广受关注。在弱酸条件下,于铂电极表面电化学聚合邻氨基苯酚(oAP)制备了除草剂特丁津(TB)分子印迹电化学传感器(MIECS)。以K_3Fe(CN)_6为电化学探针,利用循环伏安法和交流阻抗技术研究了MIECS的识别性能。结果表明:K_3Fe(CN)_6的峰电流值与TB 浓度在2~160 μmol/L 范围内呈现较好的线性关系(R~2=0.991 5),检出限为0.66 μmol/L。MIECS 达到稳定电流响应时间约为8 min,对TB 具有较好的选择性和稳定性。将该印迹膜传感器用于农田环境水样的检测分析,回收率在97.6%~102.2%。 |
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其他语种文摘
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Pollution of herbicide residues in water,soil and atmosphere has drawn common concern. This paper described an electrochemical sensor of molecularly imprinted polymers membrane (MIECS) for detecting herbicide terbuthylazine (TB),which was prepared by the method of electropolymerization with o-aminophenol (oAP)onto a platinum electrode. For performance recognition of the MIECS,the investigation was conducted by a K_3Fe(CN)_6 probe which was based on the techniques of cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS). The results showed that the peak current of K_3Fe(CN)_6 decreased linearly in a range from 2 to 160 μmol/L(R~2=0.991 5)of TB concentration with a detection limit of 0.66 μmol/L;and the response time was approximately 8 min. In addition,the MIECS showed high selectivity and long-term stability,e.g. a successful application of MIECS to measuring TB concentrations of water samples from farmland showed that the recoveries were within the range from 97.6% to 102.2%. |
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来源
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环境科学与技术
,2014,37(5):31-35 【扩展库】
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关键词
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分子印迹技术
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电化学传感器
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电聚合膜
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除草剂特丁津
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地址
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1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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贵州师范学院化学与生命科学学院, 贵州, 贵阳, 550018
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1003-6504 |
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学科
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环境科学基础理论 |
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基金
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贵州省项目
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贵州省特色重点学科建设项目
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贵州省自然科学招标项目
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文献收藏号
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CSCD:5134639
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参考文献 共
18
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