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US 4,999,305 AGranted
Apparatus for titration flow injection analysis
OwnerDuane K. Wolcott, Ernest D. Graves, Jr. +1inventors
InventorsDuane K. Wolcott, Ernest D. Graves, Jr., David G. Hunt
Life of this patent
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Abstract
A method for titration flow injection analysis by introducing a multicomponent sample into a carrier stream which flows into a mixing/sensing cell and titrating with a reactant more than one component of the sample by sensing a plurality of endpoints. The apparatus of the invention includes a stirring means within the mixing/sensing cell which generates helical flow within the cell so that bubbles are not retained in the cell.
Claims5
A mixing cell comprising:
- (a) a body defining a chamber having a means for introduction of solution to said chamber and a means for exciting of solution from said chamber where introduction of said solution takes place in the chamber at a lower level than exit of said solution;
- (b) a sensing means positioned to be in contact with said solution in said chamber;
- (c) a modified Spinfin.TM. type stirrer positioned in said chamber, said stirrer modified by removal of top fins and addition of side slots.
Dependencies are inferred from the claim text.