SYSTEMS AND METHODS FOR THE IDENTIFICATION OF COMPOUNDS USING ADMITTANCE SPECTROSCOPY
First Claim
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1. A method of determining the identity and concentration of glycol or mixture of compounds containing glycol in non-polar fluids, the method comprising the steps of:
- contacting a first surface with the solution so that a boundary layer of solution is formed on the first surface;
polling the first surface to determine the surface interaction between the first surface and the compound or mixture of compounds in the solution at the boundary layer; and
determining the identity and concentration of the one or more compounds based on the surface interaction.
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Abstract
Described herein are systems and methods for determining the location, composition and concentration of a hydrocarbon containing plume in environmental seawater. These systems and methods disclosed use multiple complex admittance measurements from seawater in order to identify the contents, concentration, and location of the hydrocarbon containing plume. In preferred variations system includes a sensor array that substantially simultaneously records plume location, depth, and composition.
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Citations
20 Claims
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1. A method of determining the identity and concentration of glycol or mixture of compounds containing glycol in non-polar fluids, the method comprising the steps of:
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contacting a first surface with the solution so that a boundary layer of solution is formed on the first surface; polling the first surface to determine the surface interaction between the first surface and the compound or mixture of compounds in the solution at the boundary layer; and determining the identity and concentration of the one or more compounds based on the surface interaction. - View Dependent Claims (2, 3, 4, 5)
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6. A method of determining the identity, concentration, or identity and concentration of one or more compounds in a drinking water solution, the method comprising the steps of:
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placing a pair of electrodes in contact with the aqueous solution so that a boundary layer of aqueous solution is formed on a first surface of one of the electrodes; applying electrical excitation between the pair of electrodes to determine a complex admittance at the first surface, wherein the applied electrical excitation results in a voltage that is below the threshold level for electrochemical reactions at the first surface; and determining the identity, concentration, or identity and concentration of one or more compounds in the aqueous solution based on the complex admittance measured between the electrodes. - View Dependent Claims (7, 8, 9, 10)
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11. A system for making down hole oil well measurements and determining the identity of a components including at least one of water, saline, methane and oil content by admittance spectroscopy, the system comprising:
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a sensor comprising a plurality of electrodes having fluid-contacting surfaces; a signal generator configured to provide electrical stimulation at a plurality of frequencies for application from the fluid-contacting surfaces of the sensor; a processor configured to receive complex admittance data from the sensor at the plurality of frequencies and to determine the identity, concentration, or the identity and concentration of one or more compounds in the solution by comparing the complex admittance data to a library of predetermined complex admittance data. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system for monitoring an closed loop control of food and chemical manufacturing using admittance spectroscopy, the system comprising:
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a sensor comprising a plurality of electrodes having fluid-contacting surfaces; a signal generator configured to provide current at a plurality of frequencies for application from one or more fluid-contacting surfaces of the sensor; a signal receiver configured to receive complex admittance data from one or more fluid-contacting surfaces of the sensor; a controller configured to coordinate the application of signals from the signal generator and the acquisition of complex admittance data from the sensor to create an admittance spectrographic fingerprint of the solution; and a processor configured to receive the admittance spectrographic fingerprint and to determine the identity, concentration or identity and concentration of the solution by comparing the admittance spectrographic fingerprint to a library of admittance spectrographic data comprising complex admittance data measured from a plurality of known compounds and mixtures of compounds in a carrier solution at a plurality of frequencies and known concentrations. - View Dependent Claims (18, 19)
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20. The system of claim 27, wherein the sensor comprises at least three different fluid-contacting surfaces formed of different materials, different geometries or different materials and geometries.
Specification