Sorbent extraction of rubeanic acid–metal chelates on a new adsorbent: Sepabeads SP70

Preconcentration and separation of trace amount of heavy metal ions on bis(2-hydroxy acetophenone)ethylendiimine loaded on activated carbon

“…The proposed procedure is superior to reported methods of heavy metal for preconcentration-separation in terms of no need of consumption of organic solvents and enrichment factor. The method is relatively rapid as compared with previously reported procedures for the enrichment of heavy metal ions [38][39][40][41][42][43][44][45][46].…”

Sodium dodecyl sulfate coated γ-alumina support modified by a new Schiff base for solid phase extraction and flame-AAS determination of lead and copper ions

“…[31][32][33][34][35][36] In order to investigate the optimum amount of ligand on the quantitative extraction of these ions by the γ-alumina, the ion extraction was conducted upon varying the amount of ligand from 0 to 70 mg. The recovery of analyte ions without ligand was not quantitative.…”

The determination of some heavy metals in food samples by flame atomic absorption spectrometry after their separation-preconcentration on bis salicyl aldehyde, 1,3 propan diimine (BSPDI) loaded on activated carbon

“…The amount of ligand on the preconcentration studies is also another main factor [16,[30][31][32][33][34]. In order to investigate the optimum amount of ligand on the quantitative extraction of these ions by the activated carbon, these ions extraction was conducted by varying the amount of ligand from 0 to 60 mg.…”

“…It has several advantages over other techniques, including stability and reusability of the solid phase, reach of high preconcentration factors, easiness of separation and enrichment under dynamic conditions, no need for organic solvents and minimal costs due to low consumption of reagents. Several selective solid phase extractors have been prepared either by physical loading or chemical binding of selected chelating reagents to different solid supports such as silica gel [8,9], activated carbon, [10,11], SDS-coated alumina [12], modified chromosorb [13], ion-imprinted polymers [14], Amberlite XAD-2000 resin [15] and Sepabeads SP70 [16].…”