Sensors & Electronics
Chemical Sensors
Measurement of Metal Ions in Solution (282)
Problem: Need rapid method with good sensitivity, selectivity, and dynamic range to measure ion concentrations in solution
Project Activity Scope (from Technical Overview Chart): Mechanisms through Sensors and Devices
PNNL Solution:
- Obtain desired selectivity with a two stage approach
- Chemical selectivity of the mesoporous sorbent phase
- Electrochemical detection of the analyte (e.g. stripping voltammetry)
- Response is linear to concentration (ppb sensitivity)
- Demonstrated for copper, mercury, lead, cadmium, and uranium
Capabilities Employed to Meet Client Needs: Electrochemistry; stripping voltametry; chemical interactions with sorbent materials (superior interface uniformity provided improved peak resolution for discrimination of different ions).
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Contact: Yuehe Lin
