Determination of arsenic species in seawater by flow injection hydride generation in situ collection followed by graphite furnace atomic absorption spectrometry

Determination of arsenic in Helianthus annuus l. by hydride generation atomic absorption spectrometry

“…This analytical method is the most widely accepted procedure for the analysis of arsenic at the g L -1 level. For determination of arsenic, antimony, and selenium by the method of hydride generation and in situ concentration in a graphite tube, successful modifiers of the tube surface are palladium compounds, magnesium compounds, nickel compounds, iridium and zirconium (Cabon and Cabon, 2000;De-qiang et al, 1997;Matusiewicz and Sturgeon, 1996;Haug and Liao, 1996;Denkhaus et al, 1998;Bermejo-Barrera et al, 1998). Combining flow injection (FI) with flame atomic absorption spectrometry (FAAS) results in a powerful analytical tool offering important advantages over conventional FAAS.…”

Optimization of a Flow Injection System with Amperometric Detection for Arsenic Determination

“…The speciation of arsenic is mostly based on the determination of total arsenic after As(V) prereduction and determination of As(III) alone. Some of the methods used are flow injection hydride generation atomic absorption spectrometry (FI-HG-AAS), [1][2][3] HG-AAS, [4][5][6] sequential injection hydride generation atomic fluorescence spectrometry (SIA-HG-AFS), 7 flow injection inductively coupled mass spectrometry (FI-ICP-MS), 8,9 electrochemical methods, [10][11][12] pervaporation-flow injection determination with photometric detection, 13 spectrophotometrical, [14][15][16] colorimetric 17,18 and FIA with chemiluminiscence detection. 19 Most methods are based on a hydride generation in an acidic media; according to the detection methods, they vary in the detection limits, as well as solution and sample consumption and the expense of the analysis itself.…”

“…3 An indirect gas-diffusion FIA method has been developed for the selective and sensitive determination of tetrahydroborate. 21 The precision of the method was better than a relative standard deviation of 2.1% at 60 mmol/dm 3 levels and better than 0.5% at 0.1 mmol/dm 3 , with a throughput of 60 samples per hour. In this research a gas-diffusion FIA method was developed and applied for arsenic determination.…”

Speciation analysis of inorganic form of arsenic in ground water samples by hydride generation atomic absorption spectrometry with insitu trapping in graphite tube

“…One of the solutions proposed to tackle the problem is the trapping of volatile hydrides in-situ in a graphite tube [4]. The use of this technique allowed a decrease of the determination limit still ensuring the possibility of measurements by the method of hydride generation [1,5,6].…”

“…The use of noble metals permits a delayed evaporation of an element under determination in the graphite tube. The probable mechanism of the modifiers activity [16] is based on the modifier's ability to bind other elements into interelement species that evaporate in temperatures higher than that of the evaporation of the element under determination [17][18][19] has been criticised by other authors [20].…”