National Research and Development Institute for Industrial Ecology ECOIND, 57-73 Drumul Podul Dambovitei Str., 060652 Bucharest, Romania.
Chemistry Department, Science Faculty, University of Craiova, 107i Bucharest Street, 200478 Craiova, Romania.
Sensors (Basel). 2023 Jan 17;23(3):1084. doi: 10.3390/s23031084.
The paper presents the validation of an electrochemical procedure for on-site Hg ions determination in wastewater samples using a modified carbon screen-printed electrode (SPE) with a complexing polymeric film based on poly(2,2'-(ethane-1,2-diylbis((2-(azulen-2-ylamino)-2-oxoethyl)azanediyl))diacetic acid) (poly). Using metal ions accumulation in an open circuit followed by anodic stripping voltammetry, the SPE-poly electrode presents a linear range in the range of 20 µg/L to 150 µg/L, with a limit of detection (LOD) = 6 µg/L, limit of quantification (LOQ) = 20 µg/L, and an average measurement uncertainty of 26% of mercury ions. The results obtained in situ and in the laboratory using the SPE-poly modified electrode were compared with those obtained by the atomic absorption spectrometry coupled with the cold vapor generation standardized method, with the average values indicating excellent recovery yields.
本文提出了一种使用基于聚（2,2'-(乙烷-1,2-二基双((2-(吖啶-2-基氨基)-2-氧代乙基)亚氨基二乙酸)))（poly）的复合聚合物膜修饰的碳丝网印刷电极（SPE）对废水中汞离子进行现场测定的电化学方法的验证。通过开路金属离子积累，然后进行阳极溶出伏安法，SPE-poly 电极在线性范围 20 µg/L 至 150 µg/L 内呈线性，检测限 (LOD) = 6 µg/L，定量限 (LOQ) = 20 µg/L，汞离子的平均测量不确定度为 26%。使用修饰后的 SPE-poly 电极在现场和实验室中获得的结果与通过原子吸收光谱法结合冷蒸气发生标准化方法获得的结果进行了比较，平均值表明回收率非常高。
