CALIBRATING MEASUREMENTS OF ANALYTE CONCENTRATIONS IN SOLVENTS FROM AN ELECTROMAGNETIC SPECTRUM
First Claim
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1. A method of calibrating a measurement of a concentration of an analyte dissolved in a solvent within a sample, the method comprising:
- detecting an amplitude of a signal from a spectral line scattered from the solvent within the sample;
detecting a scattering signal of the analyte dissolved within the sample; and
normalizing the scattering signal of the analyte based on the amplitude of the signal from the spectral line scattered from the solvent.
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Abstract
Weak signals scattered from analytes at multiple wavelengths can be summed to illuminate either a single detector or a multiplicity of detectors, offering the possibility of concentrating the spectral energy on a smaller total detector area. In addition, a method is disclosed whereby a calibration of the resulting signal for a given analyte can be obtained by means of measuring the quantity of water in the sample volume and by means of measuring the salinity of the fluid in the sample volume.
22 Citations
21 Claims
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1. A method of calibrating a measurement of a concentration of an analyte dissolved in a solvent within a sample, the method comprising:
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detecting an amplitude of a signal from a spectral line scattered from the solvent within the sample;
detecting a scattering signal of the analyte dissolved within the sample; and
normalizing the scattering signal of the analyte based on the amplitude of the signal from the spectral line scattered from the solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for calibrating a measurement of a concentration of an analyte dissolved in a solvent within a sample, the apparatus comprising:
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one or more sources of optical radiation;
a passive optical system that transmits the optical radiation from at least one of the sources to the sample, and collects at least one spectral line from a scattering signal of the analyte dissolved within the sample and collects at least one spectral line from a scattering signal of the solvent within the sample;
at least one detector that detects the scattering signal from the analyte dissolved within the sample and detects the scattering signal from the solvent within the sample; and
a processing device that normalizes the scattering signal of the analyte based on an amplitude of the scattering signal of the solvent within the sample. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification