Abstract
A device built into a standard graphite furnace which features a new concept for atomic vapor production is described. The device consists of a gas-cooled Ta insert, or “plug”, which is kept relatively cool while the sample is vaporized from the furnace wall. The analyte condenses upon this insert as the furnace is maintained at high temperature. For atomization, the coolant gas is shut off and the analyte is revaporized into the high temperature, relatively isothermal furnace volume. Detection limits for several elements are comparable with conventional wall atomization and a significant reduction in the background signal from sea water and whole blood is realized.
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