Nano Science and Technology InstituteNano Science and Technology Institute
Nano Science and Technology Institute 2005 NSTI Nanotechnology Conference & Trade Show
Nanotech 2005
Bio Nano 2005
Business & Investment
Nano Impact Workshop
Program
Sessions
Sunday
Monday
Tuesday
Wednesday
Thursday
Index of Authors
Index of Keywords
Keynote Presentations
Confirmed Speakers
Participating Companies
Industry Focus Sessions
Nanotech Expo
Special Symposia
Conferences
Sponsors
Exhibitors
Venue 2005
Organization
Press Room
Subscribe
Site Map
 
Nanotech 2005 At A Glance
Nanotech Proceedings
Nanotechnology Proceedings
Global Partner
nano tech
Supporting Organizations
Nanotech 2005 Supporting Organization
Media Sponsors
Nanotech 2005 Medias Sponsors
Event Contact
696 San Ramon Valley Blvd., Ste. 423
Danville, CA 94526
Ph: (925) 353-5004
Fx: (925) 886-8461
E-mail:
 
 

Simultaneous Determination of Heavy Metals Using Array Based Optical Chemical Sensor

Y. Choi, D. Ryoo, S.H. Park and S.Y. Park
Jeonju University, KR

Keywords:
sol-gel, heavy metals, optical chemical sensor array

Abstract:
A sol-gel optical chemical sensor encapsulated with complexing agents for simultaneous detection of selected heavy metals such as chromium, lead, mercury, and iron in aqueous media was fabricated. The sensor was prepared by acid catalyzed copolymerization of tetramethoxysilane(TMOS) and starch. TMOS and starch mixture was load to the plate and then the gelation was completed within 1 hour. The composition of TMOS and starch, pH and detection range of heavy metals were optimized. 100_L of environmental and laboratory samples spiked with heavy metals were used to evaluate the application of the chemical sensor array to real samples. The chemical sensor exhibited high specificity in identifying multiple analytes. No obvious cross-interference was obtained when a sensor array was used for simultaneous analysis of multiple samples in the presence of multiple analytes. The sensor array showed high reproducibility and relative standard deviation of 5% (n=10) was obtained. The developing reaction time was completed within at least 20 minutes. The detection limit of selected heavy metals was between 10 to 50_M and 1 to 5_M by naked eye and scanning device, respectively. The under limit could improved for drinking water by using solid phase extraction kit. The physical properties have been investigated by various techniques such as FTIR, XRD, SEM and TG-DTA to obtain information on chemical, structural and morphological composition of the layer.

Back to Program

Sessions Sunday Monday Tuesday Wednesday Thursday Authors

Nanotech 2005 Conference Program Abstract

 
Gold Sponsors
Nanotech Gold Sponsors
Silver Sponsors
Nanotech Silver Sponsors
Gold Key Sponsors
Nanotech Gold Key Sponsors
Nanotech Ventures Sponsors
Nanotech Ventures Sponsors
Sponsors
Nanotech Sponsors
News Headlines
NSTI Online Community
 
 

© Nano Science and Technology Institute, all rights reserved.
Terms of use | Privacy policy | Contact