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Proceedings Paper

Hybrid electrochemical/microfluidic monitors for trace heavy metals
Author(s): Michael T. Carter; Eric D. Cravens
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Paper Abstract

We report on development of microscale sensing devices for toxic heavy metals. These sensors-on-a-chip feature coupling of a microfluidic channel system with sensitive electrochemical detection to analyze heavy metals in aqueous samples. We have demonstrated ppb level heavy metal detection and are currently working to address detection in multianalyte mixtures, using anodic stripping voltammetry (ASV). Pb and Hg detection were facile and sensitive at this device, using a gold microband electrode and exploiting the hydrodynamic features of the device to facilitate preconcentration. Metals could be easily detected in the presence of large nitrate and acid backgrounds, e.g., 0.1 M nitric acid and in the presence of oxygen.

Paper Details

Date Published: 10 February 1999
PDF: 10 pages
Proc. SPIE 3534, Environmental Monitoring and Remediation Technologies, (10 February 1999); doi: 10.1117/12.339003
Show Author Affiliations
Michael T. Carter, Eltron Research Inc. (United States)
Eric D. Cravens, Eltron Research Inc. (United States)

Published in SPIE Proceedings Vol. 3534:
Environmental Monitoring and Remediation Technologies
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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