Chemistry: electrical and wave energy – Apparatus – Electrophoretic or electro-osmotic apparatus
Patent
1995-05-31
1996-11-12
Phasge, Arun S.
Chemistry: electrical and wave energy
Apparatus
Electrophoretic or electro-osmotic apparatus
204603, 204604, 204630, 417 49, 417 50, G01N 2726, G01N 27447
Patent
active
055736513
ABSTRACT:
Method and apparatus for flow injection analysis (FIA) using an electroosmotic pump. The apparatus includes: an electroosmotic pump having a grounding joint; a sample injection valve for introducing a sample into a carrier stream which valve is in fluid communication with the grounding joint by way of a conduit; a dispersion coil in fluid communication with the sample injection valve; and a detector which is in fluid communication with the dispersion coil. The grounding joint couples the electroosmotic pumping system and the FIA system but electrically isolates them.
Generally, the method utilizes one fluid which is electroosmotically pumped to propel a carrier for flow injection analysis at a controllable flow rate. More specifically, the method includes the steps of: adding a sample to a liquid carrier stream to form a sample zone in the carrier stream; flowing a liquid pumping stream by electroosmosis; and connecting the pumping stream with the carrier stream to propel the carrier stream.
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Dasgupta Purnendu K.
Liu Shaorong
Meier Linda Blair
Phasge Arun S,.
The Dow Chemical Company
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