GAS SRM'S FOR EMISSIONS TESTING OF HEAVY DUTY VEHICLES

This paper refers to 13 new gaseous Standard Reference Materials (SRM'S), certified by the National Bureau of Standards to help standardize emissions testing of heavy duty motor vehicles. The goal of the two year program, which is cosponsored by the Motor Vehicle Manufacturers Association, is to conduct the necessary research and to develop and produce a total of 26 new gaseous SRM's by July, 1980. The SRM's are gas mixtures of nitrogen with such gases as nitric oxide, carbon dioxide, propane or carbon monoxide in concentrations suitable for analysis of heavy duty motor vehicle emissions. The need for these new SRM's stems from the revised Clean Air Act of 1977--which has the goal of reducing the amount of carbon monoxide, nitrogen oxides and hydrocarbons contained in motor vehicle exhaust to 90 pecent of their "pre-control" levels by 1981. The gases are supplied in aluminum cyclinders, conforming to Department of Transportation specifications, with a delivered volume of gas between 700 and 870 liters at a standard temperature and pressure.

  • Corporate Authors:

    National Bureau of Standards

    Department of Commerce, Office of Technical Publications
    Washington, DC  USA  20234
  • Publication Date: 1980-1

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Filing Info

  • Accession Number: 00322252
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 19 1981 12:00AM