(1) 中国科学院海岸带环境过程与生态修复重点实验室山东省海岸带环境工程技术研究中心中国科学院烟台海岸带研究所

A new detection system was developed based on automatic sampling technology combined with AuNPs-Nafion modified electrode. Through the optimized condition of detection system depends on different parameters,such as the material of the modified electrodes with enrichment of time. Under the optimal conditions,the instrument detection limit for Fe(Ⅲ) was 4.5 nmol·L~(-1),linear range of 25 nmol·L~(-1)-1 mumol·L~(-1). Finally,the total iron content in river water was tested and compared with ICP-AES,basically where test results were the same. This instrument had the advantages of convenience and low detection cost,and it had been wide application prospects in realtime detection.