The determination of 21 elements was investigated in the presence of the palladium nitrate–magnesium nitrate (Pd–Mg) mixed modifier. Significantly higher pyrolysis temperatures could be used for the majority of elements compared with previously recommended modifiers, making possible an efficient removal of concomitants prior to the atomization of analyte elements. A 10 µg amount (1 g l–1) of NaCl had no influence on the determination of all of the elements investigated and most of the analyte elements were not affected even by a ten times higher concentration. The concentration of potassium sulfate, which had no influence on the determination, was lower for most of the elements. The tolerance towards NaCl and K2SO4 increased significantly for a number of elements when the pyrolysis temperature was lowered by 200–300 °C and the pyrolysis time was increased. For most of the elements investigated the characteristic mass values were comparable to, or better than published data. For some elements, however, such as bismuth, lead and tellurium, the characteristic mass was significantly higher. This resulted from the high stabilizing power of the Pd–Mg modifier, which necessitated higher atomization temperatures for these elements for which diffusional losses were more pronounced. The advantages and limitations of the Pd–Mg modifier are discussed.

Palladium nitrate–magnesium nitrate modifier for electrothermal atomic absorption spectrometry. Part 5. Performance for the determination of 21 elements

Feasibility of peak volume, side pixel and multiple peak registration in high-resolution continuum source atomic absorption spectrometry

Recent advances in absolute analysis by graphite furnace atomicabsorption spectrometry

Mechanisms of action of platinum group modifiers in electrothermal atomic absorption spectrometry

Spatially and temporally resolved gas phase temperature measurements in a Massmann-type graphite tube furnace using coherent anti-Stokes Raman scattering

M. Mojica

Papers

Theoretical calculation of the characteristic mass in graphite furnace atomic absorption spectrometry