Record Display for the EPA National Library Catalog


Main Title Methods for the Rapid and Accurate Measurement of Nitrate and Sulfate in Atmospheric Particulates.
Author William, D. ; Driscol, J. ; Curti, C. ; Heber, R. ;
CORP Author Abcor, Inc., Cambridge, Mass. Walden Research Div.
Year Published 1973
Report Number EPA-68-02-0564; 650-2-73-050;
Stock Number PB-230 887
Additional Subjects Sulfates ; Inorganic nitrates ; Aerosols ; Potentiometric analysis ; Leaching ; Particles ; Performance evaluation ; Chemical composition ; Air pollution ; Precision ; Sensitivity ; Ion selective electrodes
Library Call Number Additional Info Location Last
NTIS  PB-230 887 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 105p
The objectives of this study were to develop rapid and accurate analytical methods for the determination of nitrate and sulfate in atmospheric particulate samples, and to compare the new methods developed with current spectrophotometric methods for nitrate and sulfate. An Orion nitrate electrode is used to measure nitrate leached from High Volume filter samples. A sulfate procedure was developed using a lead precipitation technique and measuring the excess lead ion with an Orion lead electrode. Increased sensitivity was obtained by adding an equal volume of methyl cellosolve acetate (MCA) to the High Volume filter extracts. Studies on leaching the sulfate or nitrate from the High Volume filter samples were performed. The techniques and results are reported. The recommended procedures for nitrate and sulfate analysis are appended to this report.