Integration of gas chromatographs into federal highway administration (FHWA)/environmental protection agency near road MSAT study in Las Vegas, NV
The technical evaluation of a semi-continuous GC is presented to measure benzene and 1,3-butadiene in the near road environment. Some of the non-technical implications associated with the operation of a GC are also presented. The GC should be used to enhance the MSAT data being collected. The majority of the 1,3-butadiene and benzene concentrations measured at the 10 m site were < 2 ppb. Using the audit standard, the 1,3-butadiene and benzene accuracy responses were within 30%, based upon a linear regression analysis. Using the permeation tube response as an indication of precision, the results were within 6%. Using the audit standard responses at both 1 and 2 ppb, the method detection limit for 1,3-butadiene and benzene ranged from 0.28 to 0.57 ppb with an average method detection limit of 0.4 ppb. This is an abstract of a paper presented at the 102nd AWMA Annual Conference and Exhibition (Detroit, MI 6/16-19/2009).
