NDLI: A Portable Analytical System for Colorimetric Detection of Metal Ions in Water

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhao, Chen Zhong, Guowei Kim, Da-Eun Liu, Jinxia Liu, Xinyu
Copyright Year	2014
Abstract	Heavy metal ions released into various water environments have severe impact on both human beings and aqueous environments, and excess amount of lead and aluminum ions pose high risks to human health and could cause life-threatened diseases. The existence of metal ions in drinking water contributes most to the daily intake by humans, and thus it urges to develop a rapid, low-cost and sensitive method for detection of heavy metal ions. In this research, we develop a portable analytical system for metal ion detection in water by combining a powerful gold nanoparticle (AuNP) based colorimetric method with lab-on-a-chip technology. We utilize single-step assays involving surface functionalized AuNPs for colorimetric detection of lead (Pb2+) and aluminum (Al3+) ions in water with low limit of detection (LOD) and high sensitivity. We demonstrate that this portable system provides LODs of 30 ppb for Pb2+ and 89 ppb for Al3+, both comparable to bench-top analytical spectrometers. The system permits metal ion detections in a more economical and convenient fashion, and is particularly useful for water quality monitoring in remote and/or resource-poor settings.
File Format	PDF
ISBN	9780791849590
DOI	10.1115/IMECE2014-38994
Volume Number	Volume 10: Micro- and Nano-Systems Engineering and Packaging
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Water Nanoparticles Aluminum Water quality monitoring Metals Ions Assaying Heavy metals Diseases
Content Type	Text
Resource Type	Article

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