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Sensors & Electronics

Biological Sensors

Rapid Analyte Extraction from Soil Samples (316)

Problem: Need to rapidly extract chemical contaminants from solid samples in an environmentally safe manner

Graphic showing Field SFE Units

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

PNNL Solution:

  • Supercritical fluid extraction (SFE) methods were proven for sample preparation in the laboratory
  • Developed field portable SFE units for processing various numbers of samples [smallest unit: 1-2 samples, larger unit: up to 100 per day]
  • SFE processing is performed automatically after operator loads sample into unit sample chamber

Capabilities Employed to Meet Client Needs: Lightweight pressure vessel design and construction; novel vessel closure design for rapid, user friendly field use; automation of instrument operation to free up user; lightweight construction in rugged, field-portable packaging; unconventional materials selection/design; multiply redundant safety features; ergonomic design to allow facile operation while wearing full protective clothing (suit, hood, double gloves).

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Contact: Thomas Zemanian

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