Record Display for the EPA National Library Catalog


Main Title Collaborative Testing of a Manual Sodium Arsenite Method for Measurement of Nitrogen Dioxide in Ambient Air.
Author Margeson, John H. ; Suggs, Jack C. ; Constant, Jr., Paul C. ; Sharp, Michael C. ; Scheil, George W. ;
CORP Author Environmental Monitoring and Support Lab., Research Triangle Park, NC. Quality Assurance Branch. ;Midwest Research Inst., Kansas City, MO.
Year Published 1977
Report Number EPA/600/J-78/098;
Stock Number PB-294 921
Additional Subjects Air pollution ; Nitrogen dioxide ; Gas analysis ; Chemical analysis ; Sampling ; Laboratory equipment ; Concentration(Composition) ; Sites ; Performance evaluation ; Sodium arsenite method ; Air pollution detection ; Procedures ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-294 921 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
The sodium arsenite method for 24-h integrated measurement of NO2 in ambient air was subjected to a collaborative test. Ten collaborators sampled ambient air and simultaneously the same ambient air spiked with a reliable source of NO2 for 4 days at a common site in Kansas City, MO. NO2 concentrations of 50-370 micrograms/cu m were sampled. Within and between laboratory standard deviations were 8 and 11 micrograms/cu m, respectively, over the range 84-312 micrograms NO2/cu m. The method had a bias of -3% of the concentration over the above range. The lower detectable limit (LDL) of the method was 8 micrograms/cu m. The test results indicated that the method will produce accurate, precise measurements of ambient NO2 concentrations.