摘要
首次提出了流场形(FFS)电极的概念,并印制了FFS三电极体系。结合3D打印的薄层流通池(TLFC),采用方波溶出伏安法(SWSV),构建了镉离子(Cd2+)流动电化学检测系统。考察了电极形状、测量方式、流速、介质条件、富集时间等条件的影响。结果表明,此检测系统测量灵敏度高,重现性和稳定性好。在优化条件下,Cd2+浓度在2~100μg/L范围内与溶出峰电流呈良好的线性关系,相关系数为0.997,检出限为0.5μg/L。将本方法应用于环境水样和生物甲烷发酵液中痕量Cd2+的检测,结果与ICP-AES无显著性差异,加标回收率为90%~106%。
The concept of flow-field shaped（FFS） electrode was firstly put forward and the FFS threeelectrode system was built.Combined with the 3D-printed thin-layer flow cell（TLFC）,the flowing electrochemical detection system for detection of Cd（Ⅱ） by square wave stripping voltammetry（SWSV） was thus constructed.Several factors affecting the determination were investigated,including the shape of the electrode,measuring method,buffer medium,flow rate and deposition time.This detection system exhibited attractive properties,such as high sensitivity,good reproducibility and stability.Under optimized conditions,Cd（Ⅱ） concentration presented a good linear relationship with the stripping current in a range of 2-100 μg/L.The correlation coefficient was 0.997 and the detection limit was 0.5 μg/L.The proposed system was applied to determine trace Cd （Ⅱ） in environmental water and biological methane fermentation liquor.The detection results were consistent with the results obtained by ICP-AES and the recovery was 90%-106%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2017年第1期7-13,共7页
Chinese Journal of Analytical Chemistry
基金
国家重点基础研究发展计划(973计划
No.2013CB733501)
国家质检总局科技项目(No.2015IK129
2016IK138
2016KJ24)资助项目
supported by the National Basic Research Program of China(No.2013CB733504)
关键词
镉
3D打印薄层流通池
流场形电极
流动电化学检测体系
Cadmium
3D-Printed thin-layer cell
Flow-field shaped electrode
Flowing electrochemical detection system
