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AIHA LAP LLC > Newsfeed > Posts > NIOSH Method 2557 To Be Removed From Scope Pages
NIOSH Method 2557 To Be Removed From Scope Pages

​Please note that the NIOSH Method for analyzing diacetyl (Method 2557) is now considered historical and is "no longer recommended for use" by NIOSH due to problems with humidity and an underestimation of true concentrations.  Beginning January 30, 2017, AIHA-LAP will start to remove NIOSH Method 2557 from all  scope pages of its IHLAP-accredited laboratories where it may be included.  For more information on this Method and AIHA-LAP’s plans to remove it from our laboratories’ IHLAP scope pages, please contact AIHA-LAP offices.

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