Document YG7Ggv0enp92ZQB8r8ydaD4kO

Industrial Hygiene Digest April, 196 Conbustimeters, though quite sensitive and accurate, ar-e not specific and suffer considera interference from other inflammable vapors. The most versatile methods are those in whi the contaminated air is passed at a known rate through a. device that quantitatively remove: the acetone in such a way that it may later be determined. In a recent investigation, the method suggested by Elkins was tried. In this method, the acetone was adsorbed onto silt gel, then desorbed into water and determined. Since recoveries of acetone were low, , the method was reinvestigated and the results showed that activated silica gel is an efficient adsorption medium for sampling acetone vapor. For the determination, the acetone can be completely desorbed with normal sodium hydroxide, but not with water. Complete recover of acetone can be achieved at atmospheric concentrations* up to 4, 000mg. /cu.m. There ar 16 references. .. Public Health Eng. Abs 1 COMMUNITY AIR HYG3ENE I 403 Research in Air Pollution; Current Trends. J.H. Ludwig and B. J. Steigerwald. Am. J. Public Health 55, 1082-1092 (July, 1965). Current research in air pollution is classified by types o research and organisations con ducting and funding this research. The more important problems under Investigation are discussed in terms of present efforts and future needs. Principal areas include: medical- biological research, air quality criteria, vehicle emissions research, atmospheric chemisi and physics, meteorology, and control methods research. -- Public Health Eng. Abst 404 Regional Air Pollution Warning System. T.A. Glenn, Ir. J. Air Poll. Control Assn. j^6, 22-24 (Jan. 1966), The proposed warning system was developed by the New Vork-New Jersey Co-operative Coi mission on Interstate Air Pollution and has been submitted to the States of New York and Ne Jersey for their consideration. The Interstate Sanitation Commission will be given the re sponsibility for co-ordinating the monitoring of contaminants and would have the authority tc call a watch based on weather forecasts and concentration, of contaminants. The Commisslc would advise the Commissioners of Health of New York and New Jersey of the monitoring in fotmation from all co-operating agencies and the possible need for an alert. The standards used by the states as a basi6 for calling air pollution alert e are discussed and the action plai ned for each alert level. -- Author's abet. 405 Air Pollution Control. P. W. Hildebrandt. J. Milk Food Te chnol. 28, 127-130 (April, 1965). This paper reviews early history of associating "bad" air -with suspected diseases. The in crease in urbanization has exposed the fallacy of the limited air concept and calls attention to comparative needs of air with other life necessities. T2ie national economic loss from ai pollution is estimated at $4 to $12 billion annually. The environment of man and his manner and methods of living are discussed as contributors to the -present air pollution problems which are complicated and cannot be solved hurriedly. It is pointed out that the cost of neg lect far exceeds control expenditures and that education of the public that air is not unlimits per usual, is urgent. The most effective program is apparently at the local level. -- Public Health Eng. Abets 406 Measurements of Emissions at Heavy-Duty Boilers for Soldd Fuels. W. Thieme. Staub 25, 226-230 (June, 1965). German. Emission measurement of heavy-duty solid-fuel boilers ar reported. The dust measuring methods, test conditions, boiler design, and mode of test operations are considered. The results show that the dust emission is a function of boiler Lead and that it increases with in creasing output. The emitted dust consisted mainly of fly aash and small amounts of coke. Public Health Eng. Absti 407 Measuring Non-Steady Flow in Industrial Vents. C.I. Har-dlng, E.R. Hendrickson, and R.S. Sholtes. J. Air Poll. Control Assn. 16. 12-14 (Jan. 1966). Satisfactory methods of measuring non-steady flow in two -types of industrial vents have beei presented. These have been field tested and found to be wo rkable. The photo-pitot traverse technique should be used primarily for calibration purposes with a single impact tube used for actual sampling work. The nozzle section is light enoush that it can be handled whenever 03122110 23.