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	Development of a Pt modified microelectrode aimed for the monitoring of ammonium in solution
	Ning, Yun-Fang1,2; Yan, Peng1; Chen, You-Peng1; Guo, Jin-Song1; Shen, Yu1; Fang, Fang3; Tang, Ying1; Gao, Xu1
	2017
摘要	The development of selective and sensitive analytical methods for ammonium detection is important for the evaluation of the environmental effects of water pollution and the understanding of nitrogen cycling in ecosystems. In the current study, a new Pt nanoparticle microelectrode with high selectivity, sensitivity, accuracy and anti-interference capacity was successfully prepared for the quantitative measurement of ammonia concentration in artificial and real wastewater samples. The prepared Pt nanoparticle microelectrode had a selectively electrochemical catalytic oxidation activity for ammonium. Ammonium oxidation peak current presented a linear correlation with ammonium concentrations in artificial and real wastewater samples. Ammonium response was 92% of the initial value after 120 measurements, indicating that the prepared microelectrode is reliable and stable as an ammonium sensor. The lifetime of the modified microelectrode was of at least 150 days at room temperature and of at least 500 repetitive measurements. The present method is a simple way of preparing an ammonium sensor with very good reproducibility. Moreover, the proposed electrochemical method has been validated by comparing the obtained results of the analysis of ammonium in artificial and real wastewater samples with those obtained from spectrophotometry.
关键词	Platinum nanoparticle chemically modifying linear sweep voltammograms water
DOI	10.1080/03067319.2016.1277994
发表期刊	INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
ISSN	0306-7319
卷号	97期号:1页码:85-98
通讯作者	Chen, YP (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000395009300007
语种	英语