Untersuchungen zur adsorptiven Anreicherung von Elementspuren an Adsorberharzen

Solid phase extraction of heavy metal ions in environmental samples on multiwalled carbon nanotubes

“…Recoveries were not generally quantitative other eluents used present study with some exceptions shown in Table 1. Our results found in the present work agree with the data given in Yang and Jackwerth [40,41] and in our articles [42,43].…”

“…Quantitative recoveries for analyte ions were obtained only with 1 mol l −1 HNO 3 in acetone. As explained by Yang and Jackwerth [40,41], HNO 3 in acetone was found to be the most satisfactory combination in experiments using both APDC. Recoveries were not generally quantitative other eluents used present study with some exceptions shown in Table 1.…”

<b>Determination of trace amounts of zinc by flame atomic absorption spectrometry after separation and preconcentration onto modified natural analcime zeolite loaded 2,3,5,6-tetra(2-pyridyl)pyrazine</b>

“…Solid phase extraction (SPE) is one of the most important methods for separation and preconcentration of trace elements in samples [11][12][13][14][15][16]. The high enrichment factors possible in SPE systems in particular, allow the analytical determination of zinc at very low level.…”

Solid-phase extraction of Fe(III), Pb(II) and Cr(III) in environmental samples on amberlite XAD-7 and their determinations by flame atomic absorption spectrometry

“…Amberlite XAD-resins have found widespread application for preconcentration of trace metal ions by aid of chelating and inorganic ligands [25,26]. The most successful and popular applications of SPE have been carried out using Amberlite XAD-7 resin having a hydrophilic surface and intermediate polarity, as a polyacrylic acid ester polymer [27][28][29][30][31][32].…”