Patent ID: 6830730
Filing Date: 2004-12-14
Classification: G01N,Y10T

Abstract:
An on-stream analyzer for measuring the concentration of a substance in a fluid sample, said analyzer comprising:a. a sample injector for injecting a sample at a preset and controlled rate, the sample injector further comprising a pressure regulator coupled to a flow restrictor to control the rate of sample flow; b. a port for a carrier gas and a port for a pyrolysis gas; c. a thermal oxidizer comprising a tube furnace and a pyrolysis tube, connected to the sample injector; d. a sample conditioner, connected to and located downstream from the thermal oxidizer, said sample conditioner comprising a dryer wherein said dryer further comprises two concentric tubes, an inner tube composed of a membrane for transferring water vapor and an outer tube composed of inert material, wherein the dryer is configured such that during use a dry purge gas is in fluid communication with the inner tube and a sample gas is in fluid communication with the annular space between the inner and outer tube, and further wherein the inner tube is connected to an orifice to maintain positive pressure; e. a detector, connected to the sample conditioner, to measure the concentration of oxidized substance contained within the sample gas; and f. a programmable logic controller, connected to the detector, to calculate the concentration of oxidized substance contained within the gas mixture and consequently the concentration of substance in the original fluid sample.