Patents / Technical papers
United States Patent 6783668 Integrated pressurized
liquid extraction and purification system
Assignee: Fluid
Management Systems, Inc
A system for pressurized liquid
extraction and purification of solid samples includes a pressurized
liquid extraction (PLE) module including a PLE cell, a heating
element, a high-pressure source of an extraction solvent, a pressure
regulator, and a cooling coil. The PLE module continuously performs
high-pressure, high-temperature extraction on the solid sample
to yield liquid sample. The liquid sample is concurrently provided
to a purification module including one or more columns. The purification
module yields a purified liquid sub-sample containing substantially
all of a specific trace substance present in the solid sample.
The sub-samples are transferred to a concentrator assembly through
a collector inlet. The concentrated sub-sample can be used in subsequent
analysis to determine the concentration of the trace substance
in the original solid sample.
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