The National Institute of Standards and Technology (NIST) Gas Panel Meeting held in Atlanta on March 15 in conjunction with PITTCON saw further discussion on upcoming revisions of the 1997 Environmental Protection Agency (EPA) Traceability Protocol for Gaseous Calibration Standards
The National Institute of Standards and Technology (NIST) Gas Panel Meeting held in Atlanta on March 15 in conjunction with PITTCON saw further discussion on upcoming revisions of the 1997 Environmental Protection Agency (EPA) Traceability Protocol for Gaseous Calibration Standards.
Those with an interest have put forward numerous suggestions for revisions to the protocol. Among the issues up for discussion was the addition of new gas mixtures to the list of EPA Protocol Gases, which must be traceable to NIST standards. As a result of the meeting, NIST indicated that it would consider certifying standards containing hydrogen chloride and zero air in addition to its new Research Gas Materials (RGMs) for ammonia, nitrous oxide, and natural gas, according to Bob Wright from the EPA’s Air Pollution Prevention and Control Division. The other gases are still under consideration.
Another suggested amendment that will go forward is a change in the lower pressure limit from 150 psig to 100 psig. The limit has now been brought in line with NIST’s limit for Standard Reference Materials (SRMs). The revised protocol will also allow recertifications down to 100 psig from the current 500 psig limit.
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