Accession Number : AD0431141


Title :   NUCLEAR SUBMARINE ATMOSPHERES. PART 2 - DEVELOPMENT OF A TOTAL HYDROCARBON ANALYZER.


Descriptive Note : Interim rept.,


Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C


Personal Author(s) : Johnson,J E ; Umstead,M E ; Smith,W D


Report Date : 30 Jan 1964


Pagination or Media Count : 6


Abstract : An instrument has been developed for the shipboard monitoring of total hydrocarbons in nuclear submarine atmosphere. In addition to hydrocarbons, the instrument also measures methane and Freon-12 and, with a slight modification in operating procedure, Freon-11. The system is based upon a chromatographic technique coupled with a highly sensitive flame ionization detector. An air sample is injected into a chromatographic column and chromatographed in the usual manner until the methane and Freon-12 peaks emerge. At this point, the flow of carrier gas is reversed and the higher hydrocarbons are backflushed from the column through the detector as a single peak. The area under the backflushed peak provides a measure of the total hydrocarbon content of the atmosphere. The principles on which the instrument is based have been successfully tested at sea aboard the U.S.S. SCULPIN. (Author)


Descriptors :   *NUCLEAR POWERED SHIPS , SUBMARINES , MONITORS , INSTRUMENTATION , CHROMATOGRAPHIC ANALYSIS , CARBON COMPOUNDS , DETECTORS


Distribution Statement : APPROVED FOR PUBLIC RELEASE