Apparatus and method for analysis of a fluid sample

摘要

An apparatus for analyzing a fluid comprises a chamber to receive a fluid sample. A pump reduces a pressure in the chamber below a vapor pressure of a component of the fluid sample. At least one light system provides a light at a predetermined modulation frequency to the fluid sample. An acoustic sensor detects an acoustic signal caused by the interaction of the light and the fluid sample. A controller relates the acoustic signal to at least one chemical component of the fluid sample.

主权项

1. An apparatus for analyzing a fluid comprising:
a single chamber to receive a fluid sample; a positive displacement pump in hydraulic communication with the single chamber, the positive displacement pump reducing a pressure of the fluid sample in the single chamber below a vapor pressure of a component of the fluid sample; at least one light system to provide a light at a predetermined modulation frequency to the fluid sample, the light system having a chopper wheel formed with a plurality of rings of slots, each ring modulating the light transmitted to the fluid sample at a different predetermined modulation frequency; an acoustic sensor to detect an acoustic signal caused by the interaction of the light and the fluid sample; a controller relating the acoustic signal to at least one chemical component of the fluid sample; and a plurality of optical filters wherein each optical filter transmits a different predetermined wavelength of light, and wherein each optical filter acts cooperatively with a corresponding ring to transmit light of a predetermined wavelength, λi, at a predetermined modulation frequency, fi, to the fluid sample.