Method and apparatus for determining the non-volatile...

Details Method and apparatus for determining the non-volatile... Method and apparatus for determining the non-volatile...

2005-12-06

2005-12-06

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

By particle light scattering

With photocell detection

Reexamination Certificate

active

06972841

ABSTRACT:
The invention relates to a method for determining the non-volatile component of aerosol particles in a gas sample, especially in the exhaust gas of internal combustion engines, where the aerosol particles are deposited on an oscillating sensor (2) of at least one crystal microbalance (3), and the change in at least one oscillation parameter of the oscillating sensor is employed as measurement variable. According to the invention the oscillating sensor (2) of at least one crystal microbalance (3) is maintained at a temperature of more than 200° C. during deposition of the aerosol particles, and preferably between 250° C. and 350° C.

REFERENCES:
patent: 3561253 (1971-02-01), Dorman
patent: 5892141 (1999-04-01), Jones et al.
patent: 6181419 (2001-01-01), Snelling et al.
patent: 6295861 (2001-10-01), Tom et al.
patent: 6502450 (2003-01-01), Patashnick et al.
patent: 268530 (1989-05-01), None
patent: 10061976 (2001-06-01), None
patent: 8802480 (1988-04-01), None

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