Abstract As a result of the increasing applications in different fields, europium has become a threat to the environment and human health. Thus, it is necessary to develop a simple and rapid method for determination of europium in trace level. In this paper, a sensor for determination of Eu3+ was established by modifying a screen printed electrode (SPE) successively with poly catechol as signal amplifying element and Eu(III) ion-imprinted membrane fabricated by sol-gel method as the recognition material. After the factors influenced the sensitivity of the sensor for Eu3+ was optimized in detail, Eu3+ can be determined by differential pulse adsorptive stripping voltammetry (DPASV) in the concentration range of 3.0 × 10−7–1.0 × 10−3 mol L−1 with the detection limit of 1.0 × 10−7 mol L−1. The fabricated sensor owns outstanding selectivity, perfect stability and good regeneration. 50-fold excess concentration of rare earth ions such as Ce3+, Tb3+, Ho3+, Dy3+, Er3+, Gd3+, Pr3+, Nd3+, Yb3+ and 100-fold excess concentration of other metal ions such as Fe3+, Ni3+, Cu2+, Zn2+ and Co2+ have no influence on the determination of 1.0 × 10−5 mol L−1 Eu3+. The obtained sensor, which can maintain >90% of its original response after used >60 times or stored in the water for 2 months, has been satisfactorily used to detect Eu3+ in water samples with the relative standard deviation (RSD) of

中文翻译：

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基于聚邻苯二酚和离子印迹溶胶凝胶膜修饰丝网印刷电极的铕检测电化学传感器

摘要 由于在不同领域的应用越来越多，铕已成为对环境和人类健康的威胁。因此，有必要开发一种简单、快速的方法来测定痕量水平的铕。本文以聚邻苯二酚为信号放大元件，以溶胶-凝胶法制备的Eu(III)离子印迹膜为识别材料，依次对丝网印刷电极(SPE)进行改性，构建了一种测定Eu3+的传感器。在对影响 Eu3+ 传感器灵敏度的因素进行详细优化后，Eu3+ 可以通过差分脉冲吸附溶出伏安法 (DPASV) 在 3.0 × 10-7–1.0 × 10-3 mol L-1 的浓度范围内测定，其中检测限为 1.0 × 10−7 mol L−1。制造的传感器具有出色的选择性，完美的稳定性和良好的再生性。Ce3+、Tb3+、Ho3+、Dy3+、Er3+、Gd3+、Pr3+、Nd3+、Yb3+等稀土离子浓度超标50倍，Fe3+、Ni3+、Cu2+、Zn2+、Co2+等其他金属离子超标100倍。对 1.0 × 10−5 mol L−1 Eu3+ 的测定没有影响。所获得的传感器在使用>60次或在水中存放2个月后仍能保持其原始响应的>90%，已令人满意地用于检测水样中的Eu3+，相对标准偏差（RSD）为