Record Display for the EPA National Library Catalog


Main Title Development of a High-Purity Filter for High Temperature Particulate Sampling and Analysis.
Author Benso, A. L. ; Levin, P. L. ; Massucc, A. A. ; Valentin, J. R. ;
CORP Author Little (Arthur D.), Inc., Cambridge, Mass.
Year Published 1973
Report Number EPA-68-02-0585; 650/2-73-032;
Stock Number PB-230 886
Additional Subjects Gas filters ; Air pollution ; Flue gases ; Particles ; Filter materials ; Silicon dioxide ; Evaluation ; Glass fibers ; Impurities ; Cost analysis ; Strength ; Temperature ; Extraction ; Gas analysis ;
Library Call Number Additional Info Location Last
NTIS  PB-230 886 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 80p
The purpose of this program has been to develop and characterize a high-purity filter medium for measuring particulates in stack gases at 230 to 540C. Sufficient purity to allow optimum use of the detection limits of atomic absorption (AAS) and flame emission spectrometry (FES), and reproducible collection efficiency of 99% for dense particles as small as 0.05 um were primary objectives. The work has included analysis and purification of filter materials, filter handsheet preparation, and filter characterization. Johns-Manville Co. 99.2% silica fibers have been made into handsheet filters with satisfactory efficiency, temperature resistance, cost (about $1/square foot), strength (about 1 lb/in.), and flexibility. Almost all purity requirements for optimum AAS and FES analysis have been achieved. The strengthened filters are insensitive to humidity, insoluble in most acids and organic solvents, and slightly alkaline.