Method and apparatus for electrothermal atomization of samples

Details Method and apparatus for electrothermal atomization of samples Method and apparatus for electrothermal atomization of samples

1988-06-20

1990-01-23

McGraw, Vincent P.

Optics: measuring and testing

With sample preparation

356312, G01N 2174

Patent

active

048954438

ABSTRACT:
Sample introduction for atomic absorption spectrophotometry is effected by passage through a heated, axially displaceable capillary tube of a thermospray device; at least a fraction thereof is vaporized so that it emerges from one end of the capillary tube as a jet. A carrier liquid is forced through the capillary tube by a high pressure pump. In a retracted position, the outlet end of the capillary tube is disposed in a vacuum exhaust chamber. The sample is contained in a sample loop adapted to be connected into the flow path of the carrier liquid through an inlet valve. The capillary tube then advaces so that said end is projected into a furnace pre-heated to drying temperature. The sample is thus deposited on the inner wall of the furnace whereas the vaporized carrier is drawn off. The furnace is then heated to atomization temperature and subsequently cooled to the drying temperature.

REFERENCES:
patent: 4147434 (1979-04-01), Huber
patent: 4361401 (1982-11-01), Smith, Jr. et al.

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