Detection of Copper Ion in Water Based on a Method Combining Potentiometric and Amperometric Sensors for Accurate Measurement
10.19756/j.issn.0253-3820.231012
- VernacularTitle:基于电位型区间定位及电流型准确测量的水中铜离子检测方法研究
- Author:
Ao-Bo CONG
1
,
2
;
Yang LI
;
Hai-Fei ZHAO
;
Jian-Hua TONG
;
Chao BIAN
Author Information
1. 中国科学院空天信息创新研究院,传感技术国家重点实验室,北京 100190
2. 中国科学院大学电子电气与通信工程学院,北京 100049
- Keywords:
Potentiometric sensor;
Amperometric sensor;
Combined method;
Detection of copper ion;
Heavy metal ions
- From:
Chinese Journal of Analytical Chemistry
2024;52(8):1163-1171
- CountryChina
- Language:Chinese
-
Abstract:
In this study,a method for detecting heavy metal ions using potentiometric sensor and voltammetric sensor was proposed.By exploiting the complementary advantages of potentiometric and voltammetric electrochemical sensor,the traditional electrochemical electrode without special material preparation and modification could be used for the wide range and accurate detection of heavy metal ions in actual water samples.During detection,the concentration of target ion was measured by a potentiometric electrochemical sensor to determine the concentration range.The amperometric electrochemical sensor was then used for calibration and accurate measurement in the appropriate concentration range.Taking copper ion(Cu2+)as an example,the prepared Cu2+water sample and the actual water sample were tested.First,the copper ion selective electrode was used to determine the concentration range of Cu2+in the sample.Then,based on the gold electrode in different concentration range(0.86-100 μg/L and 100-300 μg/L)using two different optimization parameter settings to calibrate the electrochemical sensor and measure,the test results had a good correlation with those by professional water quality testing institutions.The recoveries ranged from 86.7%to 103.0%.The experimental results showed that the combination of potential sensor and current sensor could improve the accuracy of detection of heavy metal ions in water samples by electrochemical sensor.
