Solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of silver at trace and ultratrace levels

摘要

In this work, the possibilities of solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of silver in solid samples of very different nature (a biological sample, a soil, an ore concentrate and a polymer) and showing substantial differences in their analyte content (from approximately, 40 ng g(-1) up to 350 mu g g(-1)) have been evaluated, the goal always being to develop fast methods, only relying on the use of aqueous standards for calibration.