A study on the generation of hydrogen selenine and decomposition of tetrahydroborate in hydride-generation atomic absorption spectrometry

Developments in the Determination of Trace Elements by Atomic Spectroscopic Techniques

“…Brown et al (1981) considered that the precipitate observed during hydride inhibition by Ni(II) and Cu(II) could be borides instead of elemental forms of the metals. These hypotheses about the formation of metal borides in the reactions of metal ions with tetrahydroborate were later supported by Agterdenbos and Bax (1986) and Bax et al (1998). D'Ulivo et al (1991 reported that interferences of transition and noble metals were in agreement with a model based on the capture of hydride by metal colloids formed by the reduction of the ions with tetrahydroborate.…”

“…The tetrahydroborate depletion mechanism was first suggested by Pierce and Brown (1976), and it is based on the competition between interferent ions and analyte for reduction by tetrahydroborate. Agterdenbos and Bax (1986) also considered this mechanism when they proposed that reduced transition metal catalyzed tetrahydroborate decomposition, although the contribution of this effect was not directly confirmed. In the same line, Aggett and Boyes (1989) observed that the interference of some transition metals on stannane generation was due to an increase in the decomposition rate of tetrahydroborate.…”

Systematic studies on the determination of germanium by electrothermal atomic absorption spectrometry including liquid sample introduction and hydride techniques

“…The important feature of the reaction coil is the complete stripping of the hydride from the liquid into the carrier gas. 29 The collection time in the graphite furnace was about 3 min for a 10-ml sample volume. Because of the cyclic operation of the application and pre-treatment of the modifier prior to the introduction and the atomisation of the Ge in the graphite furnace, the over-all operation remains discontinuous.…”

Design and evaluation of a continuous flow, integrated nebulizer-hydride generator for flame atomic absorption spectrometry

“…[1][2][3][4][5][8][9][10][11][12][13][14][15] It has been reported that transition metals interfere in the hydride formation process after being reduced to metals 1,4,14 or after being converted to metal borides. 9,15 A catalytic effect of Co 2+ , Ni 2+ and Cu 2+ ions on the aerosol, during the decomposition of NaBH 4 in the hydride generation process 12 and transport to the atom cell 14 as well as the deterioration of the tubes during the atomization step 16 have been reported as sources of interferences. The magnitude of the transition metal interference depends on the acid concentration, 8,9 reductant concentration, 13,14 atomization source 1,17 and on the hydride generation system used.…”