Matrix modifier for modifying a matrix to improve analysis of me

Details Matrix modifier for modifying a matrix to improve analysis of me Matrix modifier for modifying a matrix to improve analysis of me

1988-10-17

1992-04-07

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

436155, 436159, 436171, 436182, 356312, G01J 342

Patent

active

051026260

ABSTRACT:
A matrix modifier of finely-divided metallic palladium dispersed to contact a metal constituent to improve analysis of the constituent during graphite furnace atomic absorption spectroscopy. The palladium interacts with a variety of metals in a sample to increase the vaporization temperatures of the metals. One way of contacting palladium with the metal analyte is to introduce it as a salt in solution with the sample into the graphite furnace along with a surfactant. A finely-divided metallic palladium having high surface area is produced in the furnace by introduction of hydrogen gas, which acts as a reducing agent, to reduce and maintain palladium in its metallic form at an early point in the temperature program, prior to evaporation of the surfactant.

REFERENCES:
patent: 4795618 (1989-01-01), Laumen
patent: 4902535 (1990-02-01), Garg et al.

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