Characterisation of spectral interferences in background correction for arsenic, selenium and antimony in electrothermal atomic absorption spectrometry
Abstract
Absorption spectra for Al, Co, Cu, Fe, Ni and Pt in the vicinity of As, Sb and Se resonance lines were measured directly in a heated graphite atomiser using a continuum source and a scanning monochromator. Deviations of non-analyte absorption from uniformity over the spectral band passes typically used in atomic absorption spectrometry could be correlated with systematic errors that arise when continuum source background correction is applied to this technique.