Accession Number : AD0727516

Title :   Permeation Tubes as Calibrated Sources of Gas,

Corporate Author : AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Saltzman,Bernard E.

Report Date : DEC 1970

Pagination or Media Count : 15

Abstract : Known low concentrations of gases are needed for toxicological studies, for calibration of instruments and for validation of analytical methods. Permeation tubes were developed as convenient sources. Liquefied gases such as sulfur dioxide, nitrogen dioxide, hydrocarbons and hydrogen sulfide are sealed in Teflon tubing and permeate through the walls for long periods at relatively constant rates of a few milligrams per day. The report discusses the use of these tubes in toxicology studies. Permeation tubes have been found to be simple, convenient and relatively constant sources for periods as long as a year. Although they have been applied mainly for calibration of instruments, by appropriate modifications they should be suitable for toxicological chamber work. (Author)

Descriptors :   (*TOXICITY, TEST METHODS), GASES, HALOCARBON PLASTICS, LIQUEFIED GASES, STANDARDS, GAS FLOW

Subject Categories : Toxicology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE