Patent ID: 9488570
Filing Date: 2016-11-08
CPC Classification: G01N

Claim Text:
1. A spectroscopic system for measuring chemical composition and/or trace impurities in a compressible fluid sample, the system comprising: an electromagnetic radiation source for generating electromagnetic radiation; optics for directing the generated electromagnetic radiation through a sample cell containing a compressible fluid sample; an optical detector array for receiving electromagnetic radiation from the sample cell containing the fluid sample and for generating an electrical signal indicative of spectral information associated with the fluid sample; a pressure modulating system for varying the pressure of the fluid sample in the sample cell, thereby varying sample density; and a processor and memory having instructions stored thereon, wherein the instructions, when executed by the processor, cause the processor to identify and/or analyze at least two absorption spectra obtained at different sample pressures in the fluid sample, thereby identifying a differential absorption spectrum for the fluid sample.