STP250

    Light Scattering Instrumentation for Particle size Distribution Measurements

    Published: Jan 1959


      Format Pages Price  
    PDF Version (572K) 27 $25   ADD TO CART
    Complete Source PDF (1.4M) 27 $55   ADD TO CART


    Abstract

    An improved instrument is described for the characterization of particles suspended in gases by means of light scattering. It consists of (1) a sensitive right-angle optical system with a photomultiplier detector, (2) a coaxial flow system which facilitates variation of the particle concentration range, (3) a photometer which continuously records the average light scattering signal, and (4) a pulse analyzer for size discrimination of individual particles. The particle analyzer was calibrated with uniform polystyrene spheres from a 0.33 to 1.17 μ in diameter, employing air as a scattering standard. The scattering intensity was found to be approximately proportional to the square of the diameter. Resolving power was determined as a function of particle size, and the instrument was critically evaluated. A brief review of particle detectors is given. A versatile pulse height selector system is described. Some variations of the instrument are proposed.


    Author Information:

    O'Konski, CT
    University of California, Berkeley, Calif.

    Bitron, MD
    University of California, Berkeley, Calif.

    Weizmann Institute of Science, Rehovoth,

    Higuchi, WI
    University of California, Berkeley, Calif.

    California Research Corp., Richmond, Calif.


    Paper ID: STP39357S

    Committee/Subcommittee: D22.05

    DOI: 10.1520/STP39357S


    CrossRef ASTM International is a member of CrossRef.