School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China.
Sensors (Basel). 2021 Jan 7;21(2):350. doi: 10.3390/s21020350.
A new potentiometric sensor based on modified carbon paste electrode (CPE) was prepared for the sensitive and selective detection of total residual chlorine (TRC) in simulated electrolytically-treated ballast water (BW). The modified CPE was prepared using ferrocene (Fc) as the sensing species and paraffin oil as the binder. It is revealed that the addition of Fc can significantly shorten the response time and improve the reproducibility, selectivity, and stability of the sensor. The open circuit potential of the Fc-CPE is in linear proportion to the logarithm of TRC within the TRC concentration range from 1 mg∙dm to 15 mg∙dm. In addition, the Fc-CPE sensor exhibits good selectivity to TRC over a wide concentration range of the possible co-exiting interference ions in seawater. The Fc-CPE electrode can be used as a convenient and reliable sensor for the continuous monitoring of TRC during the electrolytic treatment of BW.
一种基于修饰碳糊电极（CPE）的新的电位传感器被制备用于灵敏和选择性检测模拟电解处理的压载水中的总余氯（TRC）。修饰的 CPE 使用二茂铁（Fc）作为传感物质，并用石蜡油作为粘结剂制备。结果表明，Fc 的添加可以显著缩短响应时间，提高传感器的重现性、选择性和稳定性。Fc-CPE 的开路电位与 TRC 的对数在 1mg·dm 至 15mg·dm 的 TRC 浓度范围内呈线性比例关系。此外，Fc-CPE 传感器在海水可能共存的干扰离子的宽浓度范围内对 TRC 表现出良好的选择性。Fc-CPE 电极可用作在 BW 的电解处理过程中对 TRC 进行连续监测的方便可靠的传感器。
