On-line preconcentration of zinc on ethyl vinyl acetate prior to its determination by CVG-ICP-OES

Vapor generation – atomic spectrometric techniques. Expanding frontiers through specific-species preconcentration. A review

“…Our group developed for first time an on-line scandium preconcentration system implemented with chemical vapor generation associated to ICP-OES [92]. For the preconcentration/vapor generation procedure, an enhancement factor of 240-fold (10 for VG with respect to the traditional pneumatic nebulization and 24 for preconcentration) for a sample volume of 25 mL was obtained.…”

On-line Determination of Zinc in Water and Biological Samples after Its Preconcentration onto Zincon Anchored Polyurethane Foam

“…On-line preconcentration methods can improve analytical features of the procedure such as by increasing analytical throughput, precision, and accuracy while decreasing the volume of reagent and sample consumption. 7 On-line solid-phase preconcentration/separation of zinc has been performed by using mini-columns packed with several solids, such as ethylvinylacetate, 8 styrene-divinylbenzene, 9 alumina, 10 silica gel, 11 and polyurethane foam. 12,13 On-line preconcentration procedures are advantageous compared with the off-line batch systems, because they feature low volume sample/reagent consumption, high enrichment factors and high throughputs.…”

Room temperature ionic liquids and ammonium pyrrolidine dithiocarbamate synergetically enhanced the determination of zinc by chemical vapor generation coupled with flame atomic absorption spectrometry

“…1,10-Phenanthroline, 8-hydroxyquinoline, nickel ions and cetyltrimethylammonium bromide (CTAB) were used as enhancement reagents to improve the CVG efficiency of zinc by Sun et al 20,21 On-line preconcentration of zinc on ethyl vinyl acetate was also used to improve the CVG efficiency of zinc. 26 RTILs have been applied in various elds of analytical chemistry because of their fascinating properties, such as negligible vapor pressure, good thermal stability, tunable viscosity and good solubility for inorganic and organic compounds. 27,28 Recently, RTILs were used as enhancement reagents to improve the CVG efficiency of Au (3.6 times), Ag (2.7 times) and Cu (4.8 times), and the enhancement mechanism was also studied.…”