Chemistry: analytical and immunological testing – Metal or metal containing – Zn – cd – hg – sc – y – or actinides – or lanthanides
Patent
1987-03-06
1989-02-21
Marcus, Michael S.
Chemistry: analytical and immunological testing
Metal or metal containing
Zn, cd, hg, sc, y, or actinides, or lanthanides
75 70, 75251, 75252, 356312, 436 73, 436155, 436184, 436182, G01N 2174, G01J 342
Patent
active
048064890
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.
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Marcus Michael S.
Varian Associates
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