Patent ID: 9540701
Date: 2017-01-10
CPC Classifications: C12Q,G01N

Claim:
1. An apparatus for fluid analysis, said apparatus comprising: a. a near infrared electromagnetic radiation source; b. an optical wavelength selector positioned in an optical path from the near infrared electromagnetic radiation source, and configured to select one or more spectral segments of the near infrared electromagnetic radiation; c. a wavelength reference material positioned in the optical path and comprising at least one polymer optical element, said polymer optical element being at least partially transparent in at least a portion of a near infrared spectral range and exhibiting an absorption spectrum that differs in magnitude between at least two wavelengths; d. a fluid sampling interface positioned in the optical path; e. a sensor positioned at a termination of the optical path; and f. a controller configured to determine the quantity of one or more substances in a fluid sample based upon the measured spectrum of near infrared electromagnetic radiation of said fluid sample at the fluid sampling interface, wherein the controller comprises a sensor input connected to the sensor to receive a sensor signal from the sensor, wherein the controller is configured to adjust a wavelength axis of a measurement based upon a comparison utilizing the wavelength reference material for the entire spectrum collected over a wavelength range of interest.