Document km4rXdYV75gEa77QqqxG0nwpO

r v. .'i* :*V - * J^Xr iVr>V;'V.:--H,V r- y .&ja{ 4V*' i :.*.r' *: ; I *1, ~ !r X * '*Vf' ; ; -WY ' 'Y' : . ,7/ t:-'" . '1 . ' * . * ;y ^ j cy r. V., 670 J. A. Gadsden, J. Parker and W. L. Smith preliminary investigation (using perhaps X-ray diffraction techniques). If such interference is found lo be negligible, subsequent routine measurement may be conducted with comparative ease by the technique described here; periodic tests for the presence of interfering material will, however, still be desirable. In all circumstances, however the method gives a valuable upper limit to the amount of chrysotile present in a sample. REFERENCES GooDiitAD K. and Martindale R. W. (1969) The determination ofamosite and chrysotile in air- home dusts by an X-ray diffraction method. Analyst 94, 985-98S. H.M. Factory Inspectorate (1967) Problems Arising from the Use of Asbestos. H.M.S.O., London. Martin A. E. (1966) lyfro-rtJ Instrumentation and Techniques. Elsevier, Amsterdam. 4tmt>spheric Environment Pergamon Pr SOURCE TE` Michael J. Pilat, Department of Civil Engineer (First received 8 Decet Abstract--The source lest cascade it bution of particles in stacks and d inserted inside the duct or stack ( problems. The new source lest case: bution of particles emitted from a K a fluidized bed sewage sludge inciner. cell. nomenclature C Cunningham correction factor i * particle diameter J,o = particle diameter collected with i> diameter of jet (hole in impactc Af v molecular weight of gas N > number of jets per impactor sta P -- gas pressure Q ~ gas volumetric flow rate throug! Rej * Reynolds number of jet j T -- gas temperature V, * velocity of gas in jet Creek symbols ,4 -- mean free path of gas molecules !r gas viscosity - yVfriiSe \ - 3.14159 ' -' >, >3 density or particle 4 = inertial impaction parameter it0 -= inertial impaction parameter at f 1. Tiie size distributions of aerosol p: to: ., ' | (1) design new particulate air po :t (2) evaluate the performance of : and (3) characterize the aerosol emis `^Sa^^Jnfortunately a satisfactory techi t emission sources has not been a\ size measuring system include iso losses and vapor condensation, rci cost and ability to determine the ac can be inserted inside a duct or stac Mcnts. fly operating the impactor achieved with a minimum of wall ! St00 2506 PRODUCED BY FORD