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紫外光引发原位聚合制备Ce(Ⅲ)离子印迹电化学传感器
Preparation of cerium(Ⅲ) ion-imprinted electrochemical sensor via in-situ polymerization
【Author】 Jieren Xia;Qiue Cao;School of Chemical Science and Engineering, Yunnan University;
【机构】 云南大学化学科学与工程学院;
【摘要】 铈是一种含量丰富、用途广泛的稀土离子,因此研究其分析检测技术具有重要意义[1-2]。本文基于软硬酸碱理论,选择以氧为配位原子的衣康酸为功能单体,以Ce3+为模板,二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,通过紫外光(395 nm)引发,在丝网印刷电极(SPE)上原位聚合一层铈离子印迹膜(Ce(Ⅲ)-IIM),从而得到了一种Ce(Ⅲ)离子印迹膜修饰的电化学传感器(Ce(Ⅲ)-IIM/SPE)。该传感器的响应电流(i)与Ce3+的浓度(c)在4.02×10-7~2.42×10-5 mol L-1和2.42×10-5~1.45×10-3 mol L-1的范围内具有良好的线性关系(见图1和图2),检测限为1.07×10-7 mol L-1,可用于食品样品中铈的检测。
【Abstract】 To develop a simple and rapid method for the determination of Ce3+,a novel electrochemical sensor(Ce(Ⅲ)-IIM/SPE) was fabricated via ultraviolet trigger polymerization of Ce(Ⅲ) ion-imprinted membrane(Ce(Ⅲ)-IIM) on the surface of screen printed electrode (SPE) using Ce3+as template,aconic acid as functional monomer and ethylene glycol dimethacrylate (EGDMA) as crosslinker.A good linear relationship was obtained between the response current (i) of the obtained sensor and Ce3+concentration (c) in the range of 4.02×10-7~2.42×10-5 mol L-1 and 2.42×10-5~1.45×10-3 mol L-1 with the linear regression respectively.The obtained sensor with the detection limit of 1.07×10-7 mol L-1 can be used for the determination of Ce in food samples.
【Key words】 in-situ polymerization; ion-imprinted membrane; electrochemical sensor; Ce(Ⅲ);
- 【会议录名称】 中国化学会第十三届全国分析化学年会论文集(一)
- 【会议名称】中国化学会第十三届全国分析化学年会
- 【会议时间】2018-06-14
- 【会议地点】中国陕西西安
- 【分类号】TS207.3;O657.1
- 【主办单位】国家自然科学基金委员会、中国化学会