Solid phase extraction of gold(III) on Amberlite XAD-2000 prior to its flame atomic absorption spectrometric determination

Abstract

A solid phase extraction method for the determination of gold(III) at trace levels by flame atomic absorption spectrometer (FAAS) was developed. The method was based on retention of gold as chloro complexes through the Amberlite XAD-2000. The effect of some analytical parameters including hydrochloric acid concentration, sample volume, sample and eluent flow rates, eluent volume, eluent concentration and interfering ions on the recovery of gold(III) was investigated. The retention of gold(III) from 1.5 mol l(-1) HCl solution and the recovery of gold with 0.07 mol l(-1) NH3 solution were quantitative (>or=95%). The relative standard deviation (RSD) was calculated as 3.2% (n = 10). The detection limit for gold was 2 microg l(-1). The accuracy was checked with the determination of gold spiked an artificial seawater and a pure copper samples.

Novel solid phase extraction procedure for gold(III) on Dowex M 4195 prior to its flame atomic absorption spectrometric determination

“…[1][2][3]. Trace level determination of gold by flame atomic absorption spectrometry is difficult like other metal ions due to lower levels of gold than the limit of detection of flame atomic absorption spectrometry and effects of the matrix components of the working media [4][5][6][7].…”

“…SPE methods employing on different solid matrices have been successfully used for the preconcentration, separation and sensitive determination of trace metal ions including gold [17][18][19][20]. Amberlite XAD resins [2,6,21], activated carbon [10], crosslinked chitosan [11], carbon nanofibers [17], YPA(4) chelating resin [19], etc. have been used as solid phase extractor for gold in real samples.…”

Octa-<i>O</i>-Methoxy Resorcin [4] Arene Amberlite XAD-4 Polymeric Chelating Resin for Solid Phase Extraction, Preconcentration, Separation and Trace Determination of Ni(II), Cu(II), Zn(II) and Cd(II) Ions

“…Various SPE materials which have been used for the preconcentration of trace metal ions as their chelates include, activated silica gel [40,41], carbon [42][43][44][45], polyurethane foam [46] microcrystalline naphthalene [47], C 18 cartridges [48], Chelex-100 [49], Alumina [50], functionalized polyurethane foam [51], modified silica [52,53], sulfur powder [54] and Amberlite XAD resins [55][56][57][58][59][60][61]. Amberlite XAD (styrene-divinyl benzene copolymer) resins, as the copolymer backbone for the immobilization of chelating ligands, have some physical superiority, such as porosity, uniform pore size distribution, high surface area, and chemical stability toward acids, bases, and oxidizing agents, as compared to other resins [62][63][64][65].…”

Simultaneous preconcentration of Co(II), Ni(II), Cu(II), and Cd(II) from environmental samples on Amberlite XAD-2000 column and determination by FAAS

“…Among the many available materials for SPE, Amberlite XAD resins having most of properties above have been used with success as adsorbent or support for various chelating agents such as 2,6-dihydroxyphenyldiazoaminoazobenzene [23], 2-(2-benzothiazolylazo)-2-p-cresol [24] calmagite [25], dithiocarbamate [26], and sulfinylcalix [4]arene [27]. However, the metal adsorption properties of Amberlite XAD-2000 resin have been rarely explored [28][29][30][31].…”