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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 18, Number 6
BKCSDE 18(6)
June 20, 1997 

New Device for Addition of Modifier to Supercritical Fluid Carbon Dioxide Mobile Phase
Dongjin Pyo, Hohyun Kim
A new device to accurately deliver small amount of modifier into supercritical carbon dioxide fluid is described. Carbon dioxide, the most widely used mobile phase in supercritical fluid chromatography, is a relatively non-polar fluid, and hence the addition of small amount of polar modifiers could be necessary to migrate polar solutes. In this work, supercritical CO2 and modifier are delivered from the pump to a 100 μL mixing chamber in which a small magnetic bar is rotating. After passing through the mixing chamber, supercritical CO2 is changed to a new mobile phase with different polarity. The amount of modifier added into supercritical CO2 is measured by an amperometric microsensor, which is prepared from a thin film of perfluorosulfonate ionomer.
584 - 588
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