Abstract

The mathematical models are established for conventional atomic spectrometric signals by simulating experimental results with computer. The laboratory-made derivative measurement system is described. The mathematical models of derivative signals are developed for flame atomic absorption spectrometry (FAAS), cold vapour atomic absorption spectrometry (CVAAS), hydride generation atomic absorption spectrometry(HGAAS) and flow injection flame atomic absorption spectrometry (FIFAAS) and gas chromatography atomic absorption spectrometry (GCAAS). The intensity of derivative signal is in direct relation to concentration of analyte with a good linearity. A theoretical principle is developed for derivative-FAAS, derivative-FAES, derivative-CVAAS, derivative-HGAAS derivative-FIFAAS, and derivative- GCAAS. The performance and application of the derivative atomic absorption spectrometry in trace element analysis are reviewed.

Keywords: Signal models, Derivative technique, Principle, Atomic absorption spectrometry, Application