Multielectrode apparatus and techniques to prepare aligned asbes

Details Multielectrode apparatus and techniques to prepare aligned asbes Multielectrode apparatus and techniques to prepare aligned asbes

1975-09-05

1976-06-15

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

23253PC, 264108, B29D 302, G01N 2320, G01N 3106, G01N 3112

Patent

active

039634396

ABSTRACT:
A method of forming parallel aligned chrysotile asbestos fibers on a thin bstrate for use in a system for identifying the chrysotile asbestos in air pollution samples. The system comprises a collimated x-ray beam which is incident on the parallel aligned asbestos fibers. Diffracted x-rays are detected by an adjustable proportional counter set at the diffraction line position for the (002) plane. Background intensity may be detected by a second adjustable counter set above the axis at the same angle 2.theta., or the sample may be rotated 90.degree. and the one detector used to detect diffracted and background x-rays.

REFERENCES:
patent: 3497419 (1970-02-01), Winer et al.
A. L. Rickards, Anal. Chem. 45, 809 (1973).
A. L. Rickards, Anal. Chem. 44, 1872 (1972).

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