Solid phase extraction of chromium(VI) from aqueous solutions by adsorption of its ion-association complex with cetyltrimethylammoniumbromide on an alumina column

Determination of optimal adsorption-desorption conditions for selective removal of Ni(II) from petrochemical samples using ion imprinted nanosorbent

“…The 1 H-and 13 C-NMR spectra of the IIP polymers were agree with suggested structure ( 1 H NMR (300 MHz, DMSO-d6, δ, ppm): 1.910 (s, 3H, CH3 methyl), 11.320 (s, 1H, OHalcohol); 13 C NMR (75 MHz, DMSO-d6, δ, ppm): 9.46 (CH3 aliphatic), 153.26 (C imine)).…”

“…This paper deals with a selective and simple method for separation and pre-concentration of Ni(II) ion with DMG-nanopolymer. Many sample pretreatment methods including solvent extraction, clod point extraction, solid-phase extraction, membrane filtration, electrodeposition, flotation, co-precipitation and ion exchange have been utilized for pre-concentration of trace metals from natural waters [8][9][10][11][12][13][14]. Solid phase extraction is a separation technique that allows automation, miniaturization, dispenses the use of organic solvents and natural recovery of the sorbent [15].…”

Bacillus thuringiensis var. israelensis immobilized on Chromosorb 101: A new solid phase extractant for preconcentration of heavy metal ions in environmental samples

“…The sample volume is one of the most important parameters to obtain high preconcentration factors for the analysis of a real sample [17,19,[41][42][43][44]. The effect of sample volume on the retention behavior of the analytes on Bacillus thuringien- Table 1 Effects of various eluents on the recoveries of analytes (N = 3, pH 9)…”

Separation and enrichment of gold(III) from environmental samples prior to its flame atomic absorption spectrometric determination

“…Hence, separation and enrichment of analyte are important aspects in determination of gold in addition to the effect of other trace metal ions in saline matrices [6][7][8][9]. For this purpose, several separation and enrichment techniques for gold (and for trace metal ions) including solvent extraction [10][11][12], co-precipitation [13][14][15], sorption, [16][17][18][19][20] etc., have been developed. One of this technique, solid-phase extraction (SPE) by Amberlite resins has been widely used for separation and enrichment of almost all the other trace metals, besides gold [21][22][23][24][25][26][27][28][29].…”