METHOD AND APPARATUS FOR THE DETERMINATION OF TOTAL SULFUR IN A GAS

摘要

Method and apparatus for the determination of total sulfur is described. The method of the present invention for the determination of total sulfur comprising the steps of (1) diluting a sample of a gas in a ozone containing atmosphere to oxidize the sample to form sulfur dioxide from the oxidizable sulfur containing components thereof, (2) subjecting the oxidized sample to infrared radiation at a wavelength selected for the absorption thereof by sulfur dioxide and (3) determining the sulfur content as a function of the infrared absorption. The sulfur dioxide is determined indirectly utilizing methodologies such as nondispersive infrared, or Fourier transformation infrared technology may be utilized in determining the concentration of SO2 in the sample. The apparatus of the present invention includes a diluter (12) for the dilution of the sample gas with an oxygen containing gas and for the control of the flow rate of the diluted gas being monitored. The diluter communicates with a SO2 detection unit (24) for the determination and read out of the sulfur content of the monitored gas sample as the result of the absorption of infrared radiation by the sulfur dioxide of the sample gas.