Richard Lab:ASE overview

Overview

 * Automated extraction of solid samples with common solvents at elevated temperature and pressure
 * Extraction steps: preheating sample cell (optional), filling cell with solvent, heating (equilibration), static extraction, rinsing, purging solvent and extractives into collection vessel, and relief
 * Current applications
 * Water and 95% ethanol extractions for NREL biomass compositional analysis
 * Liquid hot water biomass pretreatment

Specifications

 * Oven temperature
 * Ambient to 200°C
 * Pressure
 * ~1600 psi
 * Available sample cells
 * 13-10mL stainless steel (~1.5g dry biomass)
 * 6-66mL zirconium (~10g dry biomass)
 * 6-100mL zirconium
 * Available extract collection vessels
 * 60mL vials
 * 250mL bottles

Sample Preparation Considerations

 * Grinding
 * More surface area for efficient extraction
 * Sample moisture
 * Samples may require mixing with drying (diatomaceous earth) or dispersing (Ottawa sand) agent
 * Sample pH
 * Mildly acidic or basic samples can be extracted in zirconium cells

Contact

 * Who has experience with this protocol?

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