Application of a wall-stabilized argon plasma arc for the determination of some volatile hydride-forming elements

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

“…The LOD ranged from 0.03-0.7 mg kg À1 . Eid et al 123 determined As, Sb, Se and Sn by HG-AES with a home-made, wall-stabilized, argon plasma arc source running at 20 A and 40 V. The LOD were 4, 10, 7 and 10 ng ml À1 for As, Sb, Se and Sn, respectively. They validated their procedure by the determination of As in four lake sediment samples from the Centre for Mineral and Energy Technology, Ottawa, Ontario.…”

“…Arsenic has been determined as part of several multiple analyte procedures. 103,110,[121][122][123][124]138 Many reports are concerned with both total As determination and some degree of speciation. Total As determination requires that the analyte be in the +3 oxidation state and the role of Brindle's reagent (L-cysteine) as reductant has been investi-gated by several research groups.…”

“…The determination as part of a multi-analyte suite has already been discussed. 103,110,[121][122][123][124]138 All of these reports also include the determination of As and, as for As, there is an interest in speciation. The concentrations of Sb in the environment are lower, thereby challenging the performance of AS procedures, even though HG provides increased sensitivities and LODs compared with those for conventional introduction procedures.…”

“…Several multi-analyte schemes already discussed have included the determination of Se. 103,[121][122][123][124] Murillo et al 170 determined Se (and I) in human thyroid glands by ICP-OES with a new sample introduction system consisting of a reduction module coupled to a hydride generation nebulizer. The LOD was 200 ng l À1 .…”

“…They both described procedures in which Sn was one of a multiple analyte suite. 121,123 Interestingly, neither procedure involves AAS, both are AES procedures: one involves MIP 121 and the other a dc arc. 123 1.4.2.10 Mercury.…”