Optics: measuring and testing – With sample preparation
Patent
1980-06-23
1982-11-30
Evans, F. L.
Optics: measuring and testing
With sample preparation
356312, G01N 110, G01N 2174
Patent
active
043614019
ABSTRACT:
Method and apparatus for automatically depositing predetermined reproducible amounts of nebulized samples into a furnace atomizer of an atomic absorption spectrophotometer, the atomizer being provided with an aperture, wherein a plurality of sample containers containing samples to be analyzed are arranged and successively transported on a sample supporting device, with the sample containers being open at their upper ends. The samples are aspirated from the containers via a suitable means and into a nebulizer-mixing chamber device wherein they are nebulized and mixed until such time that the nebulized sample achieves full equilibrium therein. A means is provided for depositing the nebulized and now equilibrated sample from the chamber device through the aperture into the furnace atomizer. The deposition of predetermined and reproducible amounts of nebulized samples is controlled by a means which, in a preferred embodiment, comprises a vacuum source in valved communication with the means for depositing the nebulized sample in a way that aerosol deposition is effected only during the time period when the vacuum source is shut off from the means for depositing the aerosol sample by shutting off the valve.
In another preferred embodiment, the means for controlling the amount of aerosol sample being deposited comprises a fluidic switch in communication with the nebulizer-mixing chamber device on the one hand and with the means for depositing the sample on the other. Hence, sample deposition takes place only during the time period when such communication from the chamber device to the deposition means is effected by the fluidic switch.
REFERENCES:
patent: 3525476 (1970-08-01), Boling et al.
patent: 3788752 (1974-01-01), Salvin et al.
patent: 3806250 (1974-04-01), George
patent: 3819279 (1974-06-01), Braun et al.
patent: 3866831 (1975-02-01), Denton
patent: 3893769 (1975-07-01), Woolley
patent: 4009963 (1977-03-01), George
patent: 4022530 (1977-05-01), Braun et al.
patent: 4042303 (1977-08-01), Huber
patent: 4201469 (1980-05-01), Matousek et al.
Matousek, "Aerosol Deposition in Furnace Atomization", Talanta, vol. 24, No. 5, May 1977, pp. 315-319.
Manufacturers Brochure on Perkin-Elmer Models 290B and 303, Atomic Absorption Spectrophotometers.
Eldred Edward C.
Schleicher Robert G.
Smith, Jr. Stanley B.
Evans F. L.
Instrumentation Laboratory Inc.
LandOfFree
Automatic sample deposition in flameless analysis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic sample deposition in flameless analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic sample deposition in flameless analysis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-194380