Influence of EDTA, carboxylic acids, amino- and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry

Abstract

Influence of EDTA, carboxylic acids, amino-and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry As.Within-dayandbetween-dayprecisionwereintherange3-7%and4-10%,respectively,forarsenic contentsof0.7-25mgkg -1 ,withrecoveries95-103%. Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

Potential of the hydride generation technique coupled to inductively coupled plasma optical emission spectrometry for non-chromatographic As speciation

“…Suitability of the most commonly employed pre-reducing agents for As, i.e. KI 10,11,13,14,17,18,26,28,[30][31][32][33][34][35]38,[40][41][42] and TU, 13,16,36,37 alone or combined with AA, as well as the less frequently chosen LC 20,28,29,36,39 was tested for this aim. All the experiments were conducted at a xed NaBH 4 concentration (1.0%) and variable HCl concentrations in the S and A solutions.…”

“…As a result, based on the different responses of the four As species resulting from HG, experimental protocols for As speciation are proposed. [26][27][28][29][30][31][32] There is no doubt that the procedures of speciation of all four As forms by means of HG are the most desired but also the most demanding and challenging because their development has to be proceeded by careful optimization of the experimental parameters, being appropriate for each As species present in the sample solution. Hence, most of the studies dealing with nonchromatographic As speciation by HG focus on i-As, and concern discrimination between As(III) and As(V) only.…”

Bulgarian analytical atomic spectroscopists in the new millennium—integrated in the European research area

“…95 A series of studies is devoted to the optimization of the FI preconcentration of trace elements as chelate complexes in a knotted reactor (KR) and its on-line coupling with ETAAS using various chelating reagents and preconcentration techniques. 73,74,88,96,97 The FI system is further modified with a view to its on-line coupling with ICP-time-of-flight(TOF)-MS. 25,[82][83][84] Analytical procedures using solid phase extraction (SPE), ion exchange (IE), LLE, as well as fractionation schemes were developed for the speciation determination of toxic elements like As, Cr, Hg, Tl, Fe, Pt, Sb, and Se in various food items, 50,51,53 beverages, 118-120 natural waters, 15,19,52,[121][122][123][124][125][126] soils and sediments, [16][17][18][19][20][21][127][128][129] body fluids and tissues, 17,101,130 road dust, 131 etc., with a view to assess bioavailability, biotransformations and distribution patterns.…”

Atomic Spectrometry Update. Elemental speciation

“…131 Compared with the traditional thin-layer cell, the disk cell combined the advantages of quick assembly and easy operation and provided LODs for As III and Sb III of 0.031 mg L À1 and 0.026 mg L À1 , respectively. Petrov et al 132 studied the influence of EDTA, carboxylic acids, amino-and hydroxocarboxylic acids, monosaccharides and humic substances on the generation of arsines. Ascorbic acid (0.02 M), EDTA (0.02 M), and glucose or fructose (0.2 M) equalized the sensitivities for As III , DMA V and MMA V , whereas glycine, malonic, tartaric acids, and soil humic extracts produced differences in the sensitivities.…”