Carrierless sequential injection analysis
AssigneeHach Company
InventorsCy H. Pollema, Daniel L. Campbell, Leon E. Moore
Life of this patent
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Abstract
A carrierless method is described for the analysis of a fluid sample for determination of the presence of a chemical species in the sample or for the determination of a physical characteristic of the sample. A portion of sample is drawn into a holding coil, followed by drawing one or more reagents (if desired) into the holding coil, then moving the sample and reagent (or reagents) through the reaction coil to a detector (e.g., calorimeter, potentiometer, ion selective electrode, fluorimetric detector, photometric detector, etc.). No separate carrier fluid is used in this method.
Claims20
A carrierless method for analyzing a fluid sample for determination of the presence of a chemical species therein, the method comprising the steps of:
- (a) providing a pump operatively connected to a multi-position valve, a holding coil, a reaction coil, and a flow-through detector;
- (b) drawing said sample through said valve and into said holding coil;
- (c) drawing at least one reagent into said holding coil through said valve;
- (d) moving said sample and reagent through said reaction coil to said detector in the absence of a separate liquid carrier.
A carrierless method for analyzing a fluid sample for determination of a physical property of said sample, the method comprising the steps of:
- (a) providing a pump operatively connected to a multi-position valve, a holding coil, a reaction coil, and a flow-through detector;
- (b) drawing said sample through said valve and into said holding coil;
- (c) moving said sample through said reaction coil to said detector in the absence of a separate liquid carrier.
A carrierless method for analyzing a liquid sample for determination of the presence of a chemical species therein, the method comprising the steps of:
- (a) providing a pump operatively connected to a multi-position valve, a holding coil, a reaction coil, and a flow-through detector;
- (b) drawing said sample through said valve and into said holding coil
- (c) drawing at least one reagent into said holding coil through said valve;
- and
- (d) moving said sample and reagent through said reaction coil to said detector in the absence of a separate liquid carrier.
Dependencies are inferred from the claim text.