Graphite Furnace Atomic Absorption Spectrometry and Phase Diagrams of Alloys

Abstract

The reading of phase diaprams is effective when considering high-temperature reactions during ashing and the beginning of atomisation in graphite furnace atomic absorption spectrometry. The origin of double-peak signals in the direct atomization of metal samples could be explained; the calibration curve for Pb in Fe could be utilized for Pb in Cu because of their similar phase diaprams. The role of a metal matrix modifier could be considered using phase diaprams between the matrix modifiers and analyte elements. The combinations of the modifier metals and analyte elements have been classified in three cases: effective, moderately effective and ineffective