Application of thiophene-2-carbaldehyde-modified mesoporous silica as a new sorbent for separation and preconcentration of palladium prior to inductively coupled plasma atomic emission spectrometric determination

Silica Gel Chemically Modified with Ethyl-2-benzothiazolylacetate for Selective Extraction of Pb(II) and Cu(II) from Real Water Samples

“…Several types of stripping solutions can be employed, depending on how strong are the interactions of the metal and the ligand. Jamali et al 5 have employed thiourea for eluting Pd(II) from thiophene-2-cabaldehyde-modified mesoporous silica with excellent recovery. Fan et al 10 reported on the adsorption of Hg(II) onto chemically modified silica when xylenol orange and HClO4 were used as the eluent, followed by determination with spectrophotometry without interferences from the eluent.…”

“…The sorbent must be specific to a particular analyte. There are several reports concerning sorbent materials for SPE, for example, PS-DVB, 4 mesoporous silica, 5,6 Amberlite XAD resin, 7 carbon nanotube 8,9 and silica gel. [10][11][12][13][14][15][16][17][18][19][20][21][22] Sorbent modification methods can be carried out in many ways, such as the impregnation of a chelating ligand onto the sorbent, modification on an octadecyl silica membrane [23][24][25] and the sorption of a metal-soluble ligand on the activated carbon.…”

Silica-Coated Magnetite Nanoparticles Modified with 3-Aminopropyl Groups for Solid-Phase Extraction of Pd(II) Ions from Aqueous Solutions

“…It is well-known that SPE is one of the most efficient techniques used for the separation and pre-concentration of heavy metals from water solutions (Zaporozhets et al 1996), because it is simple, does not consume large volumes of toxic organic solvents and is capable of achieving high enrichment factors (Cheng et al 2012;Huang and Hu 2008). Thus, MNs are used to retrieve toxicants such as Cr(III) (Cheng et al 2012;Song et al 2011), Pb(II) (Cheng et al 2012;Huang and Hu 2008;Li et al 2011;Madrakian et al 2012;Xu et al 2012), Cu(II) (Cheng et al 2012;Huang and Hu 2008;Podzus et al 2012), Hg(II) (Huang and Hu 2008;Li et al 2011;Song et al 2011), Cd(II) (Gong et al 2012;Huang and Hu 2008;Song et al 2011), as well as Zn(II) (Cheng et al 2012) and Mn(II) (Song et al 2011) from a variety of solutions.…”

Separation/Preconcentration and Determination of Trace Amounts of Palladium Using Modified Alumina Coated Magnetite Nanoparticles Without Chelating Agent

“…Therefore, separation/ preconcentration and determination of Pd(II) is greatly interested in environmental compartments such as soil, road dust, wastewater and different water samples. Among various methods proposed for the separation and enrichment of Pd(II) solid phase extraction (SPE) is the most widely applied technique due to rapid phase separation, simple and higher preconcentration factor [5][6][7][8][9][10][11][12][13] . At present, nano-sized materials such as TiO 2 , Al 2 O 3 , ZrO 2 , SiO 2 and carbon nanotubes have more important in SPE due to their special property of high adsorption capacity [14][15][16][17][18][19] .…”