Method of detecting and or removing trace amounts of condensible

Details Method of detecting and or removing trace amounts of condensible Method of detecting and or removing trace amounts of condensible

1987-10-13

1991-07-02

Lacey, David L.

Measuring and testing

Gas analysis

With compensation detail

73 2801, 73 3103, 55 82, 55319, 55323, 55327, 55DIG17, 55DIG25, 62 85, 324 714, 356336, 436177, 436178, 436181, G01N 2100

Patent

active

050276425

ABSTRACT:
A method to detect, measure or remove trace amounts of condensible vapors in compressed gases. The concentration of droplets detected, measured or removed may be as low as part per trillion. The compressed gas comprising a carrier gas and condensible vapors is discharged through a critical orifice in order to condense the vapors in the form of homogeneous droplets. The droplets are either detected, or their concentration measured or removed from the expanded carrier gas.

REFERENCES:
patent: 1697344 (1929-01-01), Campbell
patent: 3037421 (1962-06-01), Bigelow et al.
patent: 3102192 (1963-08-01), Skala
patent: 4272499 (1981-06-01), Cason et al.
patent: 4358302 (1982-11-01), Dahneke
patent: 4878510 (1989-11-01), Kasper et al.
"A Gas Filtration System for Concentrations of 10.sup.-5 Particles/cm.sup.3 ", Kasper and Wen, Aerosol Science and Technology, 1986.
Table of Contents of "Nucleation", by Zettlemoyer (1969).

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