New techniques for evaluating environmental exposures.
AMA Arch Ind Health 1958 May; 17(5):563-570
Instruments and techniques for the evaluation of environmental exposures in an industrial setting were described. The purpose of the instrumental analytical methods was to provide detailed information on industrial environments during investigations of potentially hazardous operations. The particle size of atmospheric dusts was determined by an automatic recording particle size analyzer that photometrically determined the rate of settling of dust particles in a suspending fluid, plotting the particle size distribution curve as absorbance versus settling time. Gas chromatography was used for solvent separation and analysis. Gas chromatography was also adapted for the analysis of mixed solvent vapors in the air at a concentration of a few parts per million. x- Ray diffraction and x-ray spectrography were used for determination of the threshold limit values of a variety of toxic compounds and elements in crystal and powdered form. Quantitative and qualitative applications of each technique were described. Limitations included the volume of work, the analytical limitations of the instruments themselves, and the degree of centralization of laboratory facilities within an industrial facility.
Measurement-equipment; Industrial-processes; Analytical-methods; Respiratory-irritants; Environmental-contamination; Air-quality; Dust-analysis; Industrial-hygiene; Occupational-hazards; Worker-health; Industrial-engineering
A.M.A. Archives of Industrial Health