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Main Title Improvement and evaluation of methods for sulfate analysis part II : final report /
Author Appel, B. R.
Other Authors
Author Title of a Work
Hoffer, E. M.,
Wehrmeister, W.,
Haik, M.,
Wesolowski, Jerome J.,
Puzak, John C.
CORP Author California Dept. of Health Services, Berkeley. Air and Industrial Hygiene Lab. Section.;Environmental Monitoring Systems Lab., Research Triangle Park, NC. Quality Assurance Div.
Publisher Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1980
Report Number EPA-600/4-80-024; EPA-R-805447-1
Stock Number PB80-185556
OCLC Number 30820821
Additional Subjects Gas analysis ; Sulfates ; Chemical analysis ; Extraction ; Samples ; Air filters ; Chromatography ; Barium sulfates ; Air pollution ; Comparison ; X ray fluorescence ; X ray analysis ; Performance evaluation ; Air pollution detection ; Turbidimetric analysis ; Ion chromatography ; SulfaVer
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-4-80-024 c.1 Headquarters Library/Washington,DC 04/30/2014
EKBD  EPA-600/4-80-024 Research Triangle Park Library/RTP, NC 07/23/1994
ELBD ARCHIVE EPA 600-4-80-024 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-4-80-024 AWBERC Library/Cincinnati,OH 01/16/1998
ESAD  EPA 600-4-80-024 Region 10 Library/Seattle,WA 09/27/2017
NTIS  PB80-185556 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 94 pages : charts ; 28 cm
Methods for extraction of sulfate from glass-fiber hi-vol and Teflon lo-vol samples were evaluated. Efficiencies were found to vary with sampling location up to 20%. Mechanical shaking in water at room temperature was significantly more efficient than ultrasonic or reflux techniques with hi-vol samples. While Teflon filters are not wet by water, pre-wetting of filters with methanol did not significantly enhance sulfate extraction. A turbidimetric sulfate method using SulfaVer IV was evaluated for ruggedness, precision and intermethod agreement. Its precision was at least equal to that of a conventional turbidimetric method, but its accuracy was somewhat less, especially at lower sulfate levels. The Dionex Model 10 ion chromatograph was evaluated for low level sulfate analysis using both a sample preconcentrator and large (0.5 ml) sample loop. The latter was the preferred technique for samples = or < 20 microgram/ml. Accuracy was within 15% in the range 2 to 20 microgram/ml with a median C.V. of 6.5% for 24 atmospheric samples collected with dichotomous samplers. Use of a sample pre-concentrator permitted analysis of samples containing < 1 microgram/ml sulfate.
"Project Officer John C. Puzak, Quality Assurance Division"--T.p. "Air and Industrial Hygiene Laboratory Section, California Department of Health Services, EPA Grant No. 805-447-1"--T.p. "April 1980"--Cover.