Novel Method for the Fast Preconcentration and Monitoring of a ppt Level of Lead and Copper with a Modified Hexagonal Mesoporous Silica Compound and Inductively Coupled Plasma Atomic Emission Spectrometry

A novel method for the simple and simultaneous preconcentration of Pb2+, Cu2+and Zn2+ions with aid of diethylenetriamine functionalized SBA-15 nanoporous silica compound

“…The nanoporous silica materials such as MCM-41 [22], LUS-1 [23] and SBA-15 [24] are suitable for application in catalysis [25], modified carbon paste electrodes [26], and micro extraction [27] owing to their high specific surface area, narrow pore size distribution and high concentration of surface hydroxyl groups. Also, there are examples of the use of mesoporous materials for adsorption applications including the removal and preconcentration of metal ions [28][29][30][31][32][33][34][35][36][37], organics [38], dyes [39], radio nuclides [40] and anionic complexes [41,42]. However these examples are limited and further work needs to be done to develop the industrial applications of mesoporous silicates.…”

Penicillium chrysogenum immobilised silica: flame atomic absorption spectrometric Pb determination in industrial effluent, sludge and food samples

“…HClO 4 . The resultant solution was evaporated to dryness, and the residue extracted with double-distilled water (Ganjali et al 2004). Appropriate aliquots from all these samples were then taken for Pb(II) preconcentration as per the procedure described in the section above.…”

Solid phase extraction of lead on octadecyl bonded silica membrane disk modified with Cyanex302 and determination by flame atomic absorption spectrometry

“…< 0.4%. and the residue obtained was extracted with double distilled water [37]. (b) Sample solutions of plant sample (0.5 g), medicinal formulation (1 g), and cocoa powder (0.5 g) were prepared by dry ashing at 500 • C in a muffle furnace for 6 h [38] and extracting with dilute HNO 3 .…”