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
Detection of Copper Ion in Water Based on a Method Combining Potentiometric and Amperometric Sensors for Accurate Measurement
从奥博 1李洋 2赵海飞 1佟建华 2边超2
作者信息
- 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;中国科学院大学电子电气与通信工程学院,北京 100049
- 2. 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
- 折叠
摘要
提出了一种电位型电化学传感器与电流型电化学传感器联用的重金属离子检测方法.利用电位型与电流型传感器的优势互补,采用未经特殊材料制备与修饰的传统电化学电极,实现了实际水样中重金属离子宽浓度范围的准确检测.检测时,首先使用电位型电化学传感器测量待测离子的浓度,判断样品的浓度区间;然后,使用电流型电化学传感器在相应的浓度区间内进行标定和准确测量.采用此传感器对配制的Cu2+水样以及实际水样进行检测.首先,使用铜离子选择性电极判断待测样品中Cu2+的浓度区间;然后,利用金电极在不同的浓度区间(0.86～100 μg/L和100～300 μg/L)内使用两种不同的优化参数设置进行电流型电化学传感器的标定和测量,本方法的测试结果与专业水质检测机构的测试结果具有较好的相关性,回收率在86.7%～103.0%之间.实验结果表明,电位型传感器与电流型传感器联用的重金属离子检测方法可以提升电化学传感器对水样中重金属离子浓度检测的准确性.
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.
关键词
电位型传感器/电流型传感器/联用方法/铜离子检测/重金属离子Key words
Potentiometric sensor/Amperometric sensor/Combined method/Detection of copper ion/Heavy metal ions引用本文复制引用
基金项目
国家重点研发计划(2021YFB3201400)
国家自然科学基金(62071455)
出版年
2024
国家科技期刊平台
NSTL
万方数据