Pump-less method and apparatus for solvent extraction from a sample
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United States of America Patent
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Aug 22, 2017
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Sep 29, 2016
app pub date -
Mar 27, 2015
filing date -
Mar 27, 2015
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Abstract
Apparatus for extracting organic analytes from a sample comprising a first compressed gas source connected to valving and a sample extraction cell connected to the valving. A pressure regulator is connected to the extraction cell outlet to the pressure regulator. The pressure regulator blocks fluid flow when the pressure at the pressure regulator inlet is below a predetermined pressure and permits fluid flow when above said predetermined pressure. The apparatus is free of operative association with a mechanical pump or with a compressed gas source other than the compressed gas source. An extraction method for using the above apparatus is described.
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