Automated titration in a recirculating fluid system
AssigneeBECS Technology, Inc.
InventorsRoger Chamberlain, Chris Edmiston, Brett Steinbrueck, Don Williams
Life of this patent
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Abstract
A method for determining a concentration of a chemical of interest in a recirculating analyte system includes the steps of selecting a first indicator threshold, measuring the flow rate of the recirculating analyte system, controllably adding a known amount of reagent to the recirculating analyte system at an known flow rate, repetitively measuring an indicator of the recirculating analyte system downstream from the addition of the reagent, and computing the concentration of the chemical of interest of the recirculating analyte system when the indicator measurement crosses the indicator threshold.
Claims17
A method for determining a concentration of a chemical of interest in a recirculating system, the recirculating system comprising an analyte having a stoichiometric coefficient of nS, the method comprising the steps of:
- (a) selecting a first indicator threshold;
- (b) measuring a flow rate of the recirculating system (fS);
- (c) controllably adding a known amount of reagent having a stoichiometric coefficient of nR to the recirculating system at an reagent flow rate (fR), wherein the reagent has a reagent concentration CR;
- (d) repetitively measuring an indicator of the recirculating system downstream from the addition of the reagent, wherein the indicator is selected from the group consisting of pH and oxidation-reduction potential;
- and
- (e) computing the concentration of the chemical of interest in the recirculating system when the indicator crosses the first indicator threshold, wherein the concentration of the chemical of interest of the recirculating system is computed as:
- CS=CR·nS/nR·fR/fS.
A device for determining a concentration of a chemical of interest in a recirculating system, the recirculating system comprising an analyte having a stoichiometric coefficient of nS, comprising:
- an intake port to receive a sample of the analyte;
- a flow rate meter for measuring a flow rate of the sample of the analyte (fS);
- a vessel holding a reagent having a stoichiometric coefficient of nR, wherein the reagent has a reagent concentration CR;
- a pump for controllably adding reagent from the vessel into the sample of the analyte at an reagent flow rate (fR);
- tubing for transferring the reagent from the pump to the sample of the analyte;
- a probe for repetitively measuring an indicator of the recirculating system downstream from the addition of the reagent, wherein the indicator is selected from the group consisting of pH and oxidation-reduction potential;
- and
- a computing element for computing the concentration of the chemical of interest in the recirculating system when the indicator measurement crosses an indicator threshold, wherein the concentration of the chemical of interest of the recirculating system is computed as:
- CS=CR·nS/nR·fR/fS.
Dependencies are inferred from the claim text.