ADAPTIVE RANGE TITRATION SYSTEMS AND METHODS
First Claim
1. A method for controlling a chemical process comprisingcontrolling a process controller communicatively coupled to a chemical reagent pump injecting a chemical reagent into the chemical process through a chemical reagent injection pump;
- controlling a sample controller communicatively coupled to a sample pump, a titrant pump, and a detector,the controller initiating a series of titration processes repeated one after the other with a set time interval between titration processes,each titration process comprising;
collecting a sample from the chemical process;
controlling the sample pump to set the flow rate of the sample as a continuously flowing and refreshed sample stream in a reaction manifold,controlling the titrant pump for pumping the titrant into the reaction manifold to contact the continuously flowing and refreshed sample stream and successively altering a titrant concentration in the reaction manifold and receiving a response from the detector for each different titrant concentration, andidentifying a titration endpoint for the reaction between the analyte and the titrant and determining an analyte concentration in the sample stream;
analyzing sample variation by determining the difference between a current analyte concentration and a previous analyte concentration from a previous titration process, and comparing the difference between the current analyte concentration and the previous analyte concentration from the previous titration to a specified minimum analyte concentration variation range,when the difference between the analyte concentration and the analyte concentration from the previous titration is greater than the specified minimum analyte concentration variation range, the controller reduces the set time interval between titration processes.
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Accused Products
Abstract
Systems for quantifying a target analyte concentration in a process solution are provided and can be used, for example, in methods for quantifying a target analyte concentration. These systems and methods include continuous automated titration methods that use titration chemistries to measure the target analyte concentration in the process solution. The method steps provide for efficient and robust automated titration methods for a variety of target analytes and can include methods that provide for methods that provide a dynamic range for measurement of target analyte concentrations.
4 Citations
20 Claims
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1. A method for controlling a chemical process comprising
controlling a process controller communicatively coupled to a chemical reagent pump injecting a chemical reagent into the chemical process through a chemical reagent injection pump; -
controlling a sample controller communicatively coupled to a sample pump, a titrant pump, and a detector, the controller initiating a series of titration processes repeated one after the other with a set time interval between titration processes, each titration process comprising; collecting a sample from the chemical process; controlling the sample pump to set the flow rate of the sample as a continuously flowing and refreshed sample stream in a reaction manifold, controlling the titrant pump for pumping the titrant into the reaction manifold to contact the continuously flowing and refreshed sample stream and successively altering a titrant concentration in the reaction manifold and receiving a response from the detector for each different titrant concentration, and identifying a titration endpoint for the reaction between the analyte and the titrant and determining an analyte concentration in the sample stream; analyzing sample variation by determining the difference between a current analyte concentration and a previous analyte concentration from a previous titration process, and comparing the difference between the current analyte concentration and the previous analyte concentration from the previous titration to a specified minimum analyte concentration variation range, when the difference between the analyte concentration and the analyte concentration from the previous titration is greater than the specified minimum analyte concentration variation range, the controller reduces the set time interval between titration processes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of controlling an automated titration system comprising
controlling a controller communicatively coupled to a sample pump, a titrant pump, and a detector, the controller initiating a series of titration processes repeated one after the other with a set time interval between titration processes, each titration process comprising: -
controlling the sample pump to set the flow rate of a continuously flowing and refreshed sample stream in a reaction manifold, controlling the titrant pump for pumping the titrant into the reaction manifold to contact the continuously flowing and refreshed sample stream and successively altering a titrant concentration in the reaction manifold and receiving a response from the detector for each different titrant concentration, and identifying a titration endpoint for the reaction between the analyte and the titrant and determining an analyte concentration in the sample stream; analyzing sample variation by determining the difference between a current analyte concentration and a previous analyte concentration from a previous titration process, and comparing the difference between the current analyte concentration and the previous analyte concentration from the previous titration to a specified minimum analyte concentration variation range, when the difference between the analyte concentration and the analyte concentration from the previous titration is greater than the specified minimum analyte concentration variation range, the controller reduces the set time interval between titration processes.
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Specification