Patent ID: 9726601
Date: 2017-08-08
CPC Classifications: G01J,G01N

Claim:
1. A process for determining a concentration of a targeted molecule M within a given time period in a liquid sampling matrix in which at least one interfering molecule M J coexists with the targeted molecule, comprising the steps of: pulsing infrared radiation from a signal source, an interference source and a reference source into a multiplexer and collimating radiation leaving the multiplexer into a pulsed beam which is directed through the liquid sampling matrix; detecting infrared radiation by a detector as a pulsed signal and reference channel output and a pulsed interference signal and reference channel output from the pulsed beam after it passes through the liquid sampling matrix; using signal processing to obtain an average ratio value of R using signal processing to obtain an average ratio value of R using R if the calibration curve is valid, using electronics to calculate the concentration of the targeted molecule M in the liquid sampling matrix by use of R providing the concentration of the targeted molecule M in the liquid sampling matrix as an output from said electronics; wherein the signal source emits radiation at a signal wavelength which is within a first absorption band of the targeted molecule M, the interference source emits radiation at an interference wavelength which is within a second absorption band of said at least one interfering molecule M wherein said at least one interfering molecule M wherein the signal source, the interference source and the reference source are each pulsed at a preselected frequency of at least N Hz which is sufficiently fast so that a given molecule of the targeted molecule M or said at least one interfering molecule M