Matrix modifier for modifying a matrix to improve analysis of metal constituents during graphite furnace atomic absorption spectroscopy
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United States of America Patent
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Apr 7, 1992
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N/A
app pub date -
Oct 17, 1988
filing date -
Mar 6, 1987
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Expired
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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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