Abstract: The present analyzing apparatus provides a means for vapor phase analysis of process streams containing a non-condensable phase, and a condensable phase wherein the phases are variously comprised of hydrogen, water, oxides of carbon, aliphatic hydrocarbons and aromatic hydrocarbons. A sample is passed into a first separation means wherein the aromatic hydrocarbons are separated from the hydrogen, water, oxides of carbon and aliphatic hydrocarbon. The hydrogen, water oxides of carbon and aliphatic hydrocarbons are passed in a second separation means while the aromatic hydrocarbons are held in the first separation, and separated into the constituent elements and compounds and thereafter passed into a first detection means wherein the concentration of each constituent is determined. The aromatic hydrocarbons are passed from a first separation means to a third separation means where the aromatic hydrocarbons are separated into the constituent compounds.

Abstract: The present sampling system provides a means for continuous vapor phase analysis of an indefinite number of process streams in a single operation. The process being sampled is connected into a single analyzing instrument by more than one delivery conduit. Each delivery conduit is heated between the process and the analyzer to a temperature sufficient to maintain the selected sample in its vapor state. During the sampling only one delivery conduit is carrying the sample into the analyzer. At the same time, a purge fluid is being backflushed into the process through each remaining delivery conduit. The backflushing sequence clears out polymerizable materials or other substances which tend to collect inside the conduit.