Method and apparatus for nondestructive selective determination

Details Method and apparatus for nondestructive selective determination Method and apparatus for nondestructive selective determination

1991-07-19

1993-02-09

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 51, 378 54, G01N 2306

Patent

active

051857731

ABSTRACT:
An amount and distribution of platinum dispersed on a catalyst carrier is determined by generating at least two energy components of lead x-rays by fluorescence of lead with gadolinium or cobalt and directing the x-rays onto a surface of the carrier and then determining an amount of platinum based upon relative attenuation of the two energy components of lead x-rays proportional to a relative amount of platinum thereon.

REFERENCES:
patent: 3114832 (1963-12-01), Alvarez
patent: 4048496 (1977-09-01), Albert
R. Jenkins and J. L. DeVries, "Practical X-Ray . . . 2nd Edition", 1969, pp. 12 through 16 and p. 185.
M. A. Short & S. Bonfiglio, "Energy . . . Detectors", NBS Spec., Publ. #604, issued Mar. 1981, pp. 391.varies.415.
C. D. Radcliffe, B. Angle, E. S. Macias, and P. P. Gaspar, "Gold . . . Rays", Archaeometry, 22, 1 (1980) pp. 47-55.
Eric W. Schneider and Gerald L. Vaneman, "The . . . Converters", 1986, Int'l Cong. SAE Tech. Paper Series 860567.

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