Mercury(编程语言)
电化学
电化学气体传感器
跟踪(心理语言学)
化学
环境化学
计算机科学
物理化学
电极
语言学
哲学
程序设计语言
作者
Yi Zhang,Guangming Zeng,Guangming Zeng,Yuan Li,Zhaomeng Chen,Guohe Huang
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2014-04-17
卷期号:4 (36): 18485-18485
被引量:44
摘要
Mercury, one of the most widespread highly toxic heavy metals, has severe detrimental effects on human health and the environment. It is significant to develop a sensitive and reliable method of accurately detecting trace levels of mercuric ions in environmental media to meet the ever-increasing demands of ongoing environmental monitoring programs. A three-dimensional mercuric ion sensor was constructed using mercury-specific oligonucleotides, gold nanoclusters, and an anionic intercalator. Due to the steric reaction field in the electrode surface microenvironment formed by the gold nanoclusters, the sensor could spatially capture mercuric ions with electroactive indication to realize trace mercury measurements with high sensitivity; the sensor exhibited strong environmental adaptability, high selectivity, and other advantages. Under optimal conditions, mercuric ions could be detected in the range from 0.05 to 350 nM, and the detection limit was 0.01 nM. The mercuric ion sensor was compared with atomic fluorescence spectrometry to analyze municipal wastewater and river water samples. In addition, the sensor performance was also analyzed according to derived formulae. This accurate method has the potential to be deployed in the field for measurements of mercury in environmental media.
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