The Electrochemical Detremination of Nitric Oxide in Seawater Media with Microelectrodes

Sensors

Zhengbin Zhang¹  Lei Xing¹  Liqing Jiang¹  Yongchen Wang¹  Chunyan Ren¹ 

[1] ¹Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China ²Department of Marine Science, the University of Georgia, Athens, GA 30602, USA

关键词: ISO-NOPMC microsensor;    modified platinum microelectrode;    Nitric oxide;    Seawater;    SNAP;   

DOI  :  10.3390/s30800304

来源: mdpi

【 摘 要 】

The electrochemical determination of nitric oxide in seawater with microelectrodes is reported in this paper. Two electrodes, ISO-NOPMC microsensor and modified platinum microelectrode, are evaluated for their performance in seawater. The peak current is found to be linear with the NO concentration in the range 1×10^-6-1.2×10^-5 mol/l for both microelectrodes. The detection limit of ISO-NOPMC microsensor is 1.4×10^-8 mol/l. Two methods for calibration of NO sensor, saturated NO solutions and decomposition of S-nitroso-acetyl-DL-penicillamine (SNAP), are discussed and compared. In addition, we examined the performance degradation of these microelectrodes in seawater due to complexation with seawater components.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.