Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry

Saber-Tehrani, Mohammad; Moghimi, Ali; Waqif-Husain, S.

doi:10.13005/msri/030206

Cited by 19 publications

(8 citation statements)

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“…Sorption of Zn(II) by some sulfur containing complexing agents loaded on various solid supports [24] was also reported. 2-Amino-1-cyclopentene-1-dithiocaboxylic acid (ACDA) for the extraction of silver(I), Co(II) and palladium(II) 25 , 2-[2-triethoxysilyl-ethylthio] aniline for the selective extraction and separation of palladium from other interfering metal ions 26 as well as thiosemicarbazide for sorption of different metal ions 27 and thioanilide loaded on silica gel for preconcentration of palladium(II) from water 28,29 are also sulfur contaning silica gel phases.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Zn(II) Using Magnetic Chitosan Nanoparticles Grafted with B-cyclodextrin and Determination by FAAS

karimnezhad¹,

Moghimi²

2014

Orient. J. Chem

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Section: Introductionmentioning

confidence: 99%

Extraction of Zn(II) Using Magnetic Chitosan Nanoparticles Grafted with B-cyclodextrin and Determination by FAAS

karimnezhad¹,

Moghimi²

2014

Orient. J. Chem

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“…[14][15][16][17][18] The most successful selective solid phases for soft metal ions are sulfur-containing compounds, which are widely used in different analytical fields. Amongst these sulfur-containing compounds are dithiocarbamate deriva-tives for selective extraction of mercury(II) 19,20 and pre-concentration of various cations 21,[23][24][25][26] and 2-mercaptobenzothiazole-modified silica gel for on-line preconcentration and separation of silver for atomic absorption spectrometric determinations. 22 Ammonium hexa-hydroazepine-1-dithiocarboxylate (HMDC)-loaded on silica gel as solid phase pre-concentration column for atomic absorption spectrometry (AAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) was reported.…”

Section: Introductionmentioning

confidence: 99%

“…23 Sorption of copper(II) by some sulfur containing complexing agents loaded on various solid supports 24 was also reported. 2-Aminocyclopentene-1-dithiocaboxylic acid (ACDA) for the extraction of silver(I), mercury(II) and palladium(II), 25 2-(2-triethoxysilylethylthio)aniline for the selective extraction and separation of palladium from other interfering metal ions, 26 thiosemicarbazide for sorption of different metal ions 27 and thioanilide loaded on silica gel for pre-concentration of palladium(II) from water 28 are also sulfur contaning silica gel phases.…”

Section: Introductionmentioning

confidence: 99%

Selective Pre‐concentration and Solid Phase Extraction of Mercury(II) from Natural Water by Silica Gel‐loaded (E)‐N‐(1‐Thien‐2′‐ylethylidene)‐1,2‐phenylenediamine Phase

Moghimi

2007

Chin. J. Chem.

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Silica gel-loaded (E)-N-(1-thien-2'-ylethylidene)-1,2-phenylenediamine (TEPDA) phase was synthesized based on physical adsorption approaches. The stability of a chemically modified TEPDA especially in concentrated hydrochloric acid that was then used as a recycling and preconcentration reagent allowed the further uses of silica gel-loaded immobilized TEPDA phase. The application of this silica gel-loaded phase to sorption of a series of metal ions was performed by using different controlling factors such as the pH of the metal ion solution and the equilibration shaking time by the static technique. This difference was interpreted on the basis of selectivity incorporated in these sulfur containing silica gel-loaded TEPDA phases. Hg(II) was found to exhibit the highest affinity towards extraction by these silica gel-loaded TEPDA phases. The pronounced selectivity was also confirmed by the determined distribution coefficients (K d ) of all the metal ions, showing the highest value reported for mercury(II) extraction by the silica gel immobilized TEPDA phase. The potential applications of the silica gel immobilized TEPDA phase to selective extraction of mercury(II) from aqueous solution were successfully accomplished and preconcentration of low concentration of Hg(II) (30 pg•mL -1 ) from natural tap water with a preconcentration factor of 200 for Hg(II) off-line analysis was conducted by cold vapor atomic absorption analysis.

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“…Nevertheless, several other techniques for the preconcentration and separation of copper have been proposed, including liquid chromatography, 22 supercritical fluid extraction, 23 flotation, 24 aggregate film formation, 25 liquid membrane, 26 column adsorption of pyrocatechol violet-copper complexes on activated carbon, 27 ion pairing, 8,29 preconcentration with yeast, 30 and solid phase extraction (SPE) using C 18 cartridges and disks. [31][32][33]56 Solid phase extractions or liquid-solid extractions are popular and growing techniques that are used to sample preparation for analysis. They are an attractive alternative for classical liquid-liquid extraction methods that reduce solvent usage and exposure, disposal costs and extraction time for sample separation and concentration purposed.…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction of Trace Copper(II) Using Octadecyl Silica Membrane Disks Modified with N,N′‐Disalicylideneethylenediamine

Moghimi¹

2007

Chin. J. Chem.

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A simple and reproducible method for the rapid extraction and determination of trace amounts of copper(II) ions using octadecyl-bonded silica membrane disks modified by N,N'-disalicylideneethylenediamine (DESDA) and atomic absorption spectrometry was presented. The method is based on complex formation on the surface of the ENVI-18 DISK TM disks followed by stripping of the retained species by minimum amounts of appropriate organic solvents. The elution is efficient and quantitative. The effects of potential interfering ions, pH, ligand amount, stripping solvent, and sample flow rate were also investigated. Under the optimal experimental conditions, the break-through volume was found to about be 1000 mL providing a preconcentration factor of 500. The maximum capacity of the disks was found to be (389±4) µg for Cu 2＋ . The limit of detection of the proposed method is 5 ng per liter. The method was applied to the extraction and recovery of copper in different water samples.

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Preconcentration and Determination of Chromium Species Using Octadecyl Silica Membrane Disks and Flame Atomic Absorption Spectrometry

Cited by 19 publications

References 0 publications

Extraction of Zn(II) Using Magnetic Chitosan Nanoparticles Grafted with B-cyclodextrin and Determination by FAAS

Extraction of Zn(II) Using Magnetic Chitosan Nanoparticles Grafted with B-cyclodextrin and Determination by FAAS

Selective Pre‐concentration and Solid Phase Extraction of Mercury(II) from Natural Water by Silica Gel‐loaded (E)‐N‐(1‐Thien‐2′‐ylethylidene)‐1,2‐phenylenediamine Phase

Solid Phase Extraction of Trace Copper(II) Using Octadecyl Silica Membrane Disks Modified with N,N′‐Disalicylideneethylenediamine

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