基于钯金修饰超微叉指电极的土壤硝酸盐检测系统

引用本文: 姜浩延, 刘欣, 徐钰豪, 李洋, 佟建华, 边超. 基于钯金修饰超微叉指电极的土壤硝酸盐检测系统[J]. 分析化学, 2021, 49(8): 1342-1349. doi: 10.19756/j.issn.0253-3820.211124 shu

Citation: JIANG Hao-Yan, LIU Xin, XU Yu-Hao, LI Yang, TONG Jian-Hua, BIAN Chao. Rapid Detection System for Soil Nitrate Based on Palladium-Gold Modified Ultramicro Interdigital Electrode Chip[J]. Chinese Journal of Analytical Chemistry, 2021, 49(8): 1342-1349. doi: 10.19756/j.issn.0253-3820.211124 shu

基于钯金修饰超微叉指电极的土壤硝酸盐检测系统

姜浩延 ^1,2, ,
刘欣 ^1,2, ,
徐钰豪 ^1,2, ,
李洋 ^1, ,
佟建华 ^1, ,
边超 ^{1,
,}

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

通讯作者: 边超,E-mail:cbian@mail.ie.ac.cn

基金项目:
国家重点研发计划项目（No.2020YFB2009003）资助。

摘要: 针对土壤中硝酸盐快速检测的需求，研制了一种集成土壤浸出液获取和硝酸盐检测功能的土壤硝酸盐现场快速检测系统。硝酸盐检测采用钯金修饰的超微叉指传感电极。该传感电极采用微电子机械系统（MEMS）工艺制备，集成结构为叉指阵列分布的工作电极和对电极。硝酸盐敏感钯金复合膜采用恒压法制备，利用两种金属的协同作用提高硝酸盐检测的灵敏度和稳定性。研制的传感电极对浸出液中硝酸盐的线性响应范围为0.5~100 mg/L（以N计），检出限为0.13 mg/L（3σ），灵敏度1.8 μA·L/mg。连续70次重复测量的相对偏差小于10%。此传感电极对土壤中常见的Cl^-、CO₃^2-、SO₄^2-和SiO₄^2-表现出一定的抗干扰能力。采用研制的土壤硝酸盐检测系统获取土壤浸出液，并对浸出液中的硝酸盐进行检测，检测结果与标准方法一致。

关键词:

English

Rapid Detection System for Soil Nitrate Based on Palladium-Gold Modified Ultramicro Interdigital Electrode Chip

1.
State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China;
2.
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: BIAN Chao, cbian@mail.ie.ac.cn

Received Date: 06 February 2021
Revised Date: 26 April 2021
Fund Project:
Supported by the National Key Research and Development Project of China (No.2020YFB2009003).

Abstract: To meet the needs of rapid detection of nitrate in soil, a field rapid detection system for nitrate in soil was designed, which integrated the functions of soil leaching solution acquisition and nitrate detection. Nano palladium and gold modified ultramicro interdigital sensing electrode was used for nitrate detection. The sensing electrode was fabricated using micro-electro-mechanical systems (MEMS) technique, and the integrated structure was interdigital array of working electrode and counter electrode. Palladium and gold were modified on the surface of the working electrode by potentiostatic method to form a palladium-gold composite sensitive film. Through the optimization of the preparation parameters of the sensor electrode, the linear response range of the sensor electrode to nitrate was 0.5-100 mg/L (as N), the detection limit was 0.13 mg/L (3σ), the sensitivity was 1.8 μA·L/mg, and the relative deviation was less than 10% after 70 times of continuous repeated measurement. Furthermore, the developed sensor electrode had certain anti-interference ability against common ions in soil including Cl^-, CO₃^2-, SO₄^2- and Si₄^2-. The soil leaching solution was obtained by the developed soil nitrate detection system, and the nitrate in the leaching solution was detected. The detection results correlated with the detection results of the standard method.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

基于钯金修饰超微叉指电极的土壤硝酸盐检测系统

通讯作者: 边超,E-mail:cbian@mail.ie.ac.cn

English

Rapid Detection System for Soil Nitrate Based on Palladium-Gold Modified Ultramicro Interdigital Electrode Chip

Corresponding author: BIAN Chao, cbian@mail.ie.ac.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于钯金修饰超微叉指电极的土壤硝酸盐检测系统

通讯作者: 边超,E-mail:cbian@mail.ie.ac.cn

English

Rapid Detection System for Soil Nitrate Based on Palladium-Gold Modified Ultramicro Interdigital Electrode Chip

Corresponding author: BIAN Chao, cbian@mail.ie.ac.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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