A system for conditioning a gaseous sample for analysis in which the sample is handled in a manner which precludes reaction of reactive components therein. Means are provided for sending a predetermined amount of a gaseous sample through an analyzer while permitting the remainder of the gaseous sample to by-pass the analyzer. The system has means for purging essentially all components thereof so as to minimize system contamination and maximize accuracy of analysis.
A sample containing reactive component is preconditioned in a sample conditioner in a manner which precludes reactions therein and passed to an analyzer through a conduit located in a passageway maintained at a desired temperature by heat exchange with hot air. After the analysis is completed, the sample is purged from the analyzer through the separate conduit extending from the analyzer through said passageway back to the sample conditioner.
The apparatus for determining the quantity of impurity in a gas by chromatography in gas phase comprises a device for cryogenically trapping impurities, which is provided with a column filled with granular particles of a product capable of adsorbing the impurities, refrigerating means capable of keeping the column at low temperature during passage of the gas loaded with impurities and reheating means for an ulterior desorption; a first chromatographic adsorber in gas phase intended for a preliminary analysis and provided with a filling column for each impurity; a device for the cryogenic recentering of the purities, which is provided with a capillary column, refrigerating means capable of keeping the column at low temperature during the passage of a carrier gas which has gone through the first chromatographic adsorber, and desorption reheating means; and a second chromatographic adsorber in gas phase provided with a capillary column, a detection device being mounted at the outlet.
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.
A gas chromatographic system for analyzing gas components includes an analyzer, a constant temperature oven, an analyzer case, an indicator, an integrated sample conditioner, and a coupler. The analyzer includes a sample valve having a detector and a heater built therein and first and second columns wound around the periphery of the sample valve. The constant temperature oven accommodates the analyzer unit therein. The analyzer case accommodates the constant temperature oven. The indicator is protruded from the analyzer case to display analysis processes and results. The integrated sample conditioner provides an optimal condition for analysis. The coupler couples the analyzer unit with the sample conditioner so as to supply a sample gas and one of a carrier gas and a reference gas from the sample conditioner to the analyzer unit.
Apparatus and methods for on-line analysis of multiple stream processes wherein each stream has an influent delivered to a treatment zone and an effluent discharged from such zone and wherein both the influent and effluent are analyzed and the analyses compared for the evaluation of the effectiveness of the treatment.
