Role of metal matrix modifier in ashing and beginning of the atomization process in graphite furnace-atomic absorption spectrometry

Contributions of discharges from a historic antimony mine to metalloid content of river waters, Marlborough, New Zealand

“…Graphite furnace AAS analysis was performed using a Perkin Elmer 4100ZL system controlled with Perkin-Elmer AA Winlab v. 4.1 software. A Pd/Mg(NO 3 ) 2 matrix modifier was used (Ouishi et al, 1994). The detection limit for both As and Sb was 5 Ag/l.…”

Release of selenium and tin from the graphite support in the presence of tungsten and palladium modifiers

“…Palladium is characterized by relatively weak interaction with graphite in comparison to tungsten and tends to form microdroplets on the graphite support [12]. It is possible that the analyte is vaporized from the surface of the droplets [13]. The existence of various compounds between Pd and Se or Sn is shown using the different instrumental methods -SEM, ~tEDXRD [14][15][16].…”

Mechanism of the action of palladium and palladium ? magnesium nitrate modifiers used in the determination of tellurium by electrothermal atomic absorption spectrometry

“…It has been suggested that a thermally stable compound and/or solid solution could be formed between palladium and an analyte. [1][2][3][4][5][6][7][8][9][10][11] For moderately volatile elements, magnesium nitrate can be reduced to the oxide and made to imbed the analyte in the matrix of magnesium oxide. 12,13 The instrumental techniques used to study these mechanisms have involved X-ray diffraction spectrometry, 8 X-ray photoelectron spectrometry, 5,8 mass spectrometry, 6 scanning electron microscopy 11 and Fourier transform infrared spectrometry.…”