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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

Chart graphic of Current and Metal Ion Concentration

Project Activity Scope (from Technical Overview Chart): Mechanisms through Sensors and Devices

PNNL Solution:

  • Obtain desired selectivity with a two stage approach
    1. Chemical selectivity of the mesoporous sorbent phase
    2. 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

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