Solid phase extractive preconcentration of silver from aqueous samples

Ayata, Sevda; Kaynak, Ipek; Merdıvan, Melek

doi:10.1007/s10661-008-0359-6

Cited by 23 publications

(11 citation statements)

References 21 publications

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“…The synthesis of new benzoylthiourea compounds also becomes widespread due to their potential application in biological [8][9][10][11][12] and analytical chemistry [13][14][15][16][17]. The ability of thiourea derivatives to complex with transition metal cations is well known [18,19].…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure and Cyclic Voltammetric Studies on the Metal Complexes of N-(Dimethylcarbamothioyl)-4-fluorobenzamide

Binzet

Turunç

Flörke

et al. 2018

Journal of Chemistry

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We synthesized N-(dimethylcarbamothioyl)-4-fluorobenzamide compound and its copper(II) and nickel(II) complexes. The structures of compounds have been characterized by elemental analysis and spectral data (IR, 1 H NMR). Furthermore, crystal and molecular structure of the synthesized complexes have been identified by using single crystal X-ray diffraction data. In the complexes formation the metal atom was coordinated via two sulfur atoms and two oxygen atoms. The single crystal structure of copper(II) and nickel(II) complex exhibits slightly distorted square planar geometry. The oxygen atoms are in a cis configuration. It appeared that the lengths of the thiocarbonyl and carbonyl bonds are longer than the average for C=S and C=O; meanwhile the C-N bonds in the complex ring appeared to be shorter than the average for C-N single bonds. These data show that C-O, C-S, and C-N bond lengths of the complexes suggest considerable electronic delocalization in the chelate ring. All bond lengths and angles obtained as a result of the analyses are found to be within experimental error limits. The obtained crystal analysis data shows that the structure of complex compounds is compatible with similar compounds in literature. Electrochemical behavior of complexes has been investigated by cyclic voltammetry technique in aprotic media. From the cyclic voltammetric investigation, both of the complexes have demonstrated electroactive properties.

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Section: Introductionmentioning

confidence: 99%

Crystal Structure and Cyclic Voltammetric Studies on the Metal Complexes of N-(Dimethylcarbamothioyl)-4-fluorobenzamide

Binzet

Turunç

Flörke

et al. 2018

Journal of Chemistry

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“…Accordingly, several selective solid phase extractors have been prepared by either physical loading or chemical binding of selected chelating reagents to silica gel for preconcentration of silver ion. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] In this study, an easy and efficient method for the preparation of a modified silica gel sorbent for preconcentration of Ag + ion is introduced. A two-step sol-gel method 28 has been applied for the modification of silica gel and immobilizing of 5-(4-dimethylaminobenzylidene)-rhodanine (DBR) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Selective and Extractive Preconcentration of Silver Ion from Aqueous Samples on Modified Silica Gel with 5-(4-Dimethylaminobenzylidene)-Rhodanine; Prepared by Sol-Gel Method

et al. 2009

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A new modified silica gel doped with 5-(4-dimethylaminobenzylidene)-rhodanine was prepared for separation, preconcentration and determination of silver ion by atomic absorption spectrometry. This new modified silica gel was used as an effective adsorbent for the solid phase extraction of Ag + from aqueous solutions. The variables that influence the adsorption/desorption of trace levels of Ag + were optimized in the column process. The preconcentration factor and capacity of the adsorbent at optimum conditions were found as 220 and 420 mg Ag + per gram of adsorbent, respectively. The relative standard deviation and the detection limit for measurement of Ag + in our experiments were less than 1.5% (n = 10) and 0.02 mg L -1 , respectively. Common coexisting ions did not interfere with the separation and determination of silver ion. The proposed method was successfully applied for preconcentration and determination of silver ion in some spiked water samples.

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“…For the pH 1 and 2, a KCl/HCl solution was used. CH3COOH/CH3COONH4 buffer was used to adjust pH in the range of 3-6, while NH3/NH4Cl buffer was used for pH [8][9][10]. Synthesis of reagent.…”

Section: 14mentioning

confidence: 99%

“…Several studies have been reported for the XAD series resins which are impregnated with various reagents. [7][8][9][10][11][12] The large surface area of Amberlite XAD-16 resin (800 m 2 g -1…”

Section: Introductionmentioning

confidence: 99%

Preconcentration and Determination of Fe(III) from Water and Food Samples by Newly Synthesized Chelating Reagent Impregnated Amberlite XAD-16 Resin

Tokahoglu¹,

Ergun²,

Cukurovah³

2010

Bulletin of the Korean Chemical Society

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A simple and reliable method has been developed to selectively separate and concentrate trace amounts of Fe(III) ions from water and food samples by using flame atomic absorption spectrometry. A new reagent, 5-hydroxy-4-ethyl-5,6-di-pyridin-2-yl-4,5-dihydro-2H-[1,2,4] triazine-3-thione, was synthesized and characterized by using FT-IR spectroscopy and elemental analysis. Effects of pH, concentration and volume of elution solution, sample flow rate, sample volume and interfering ions on the recovery of Fe(III) were investigated. The optimum pH was found to be 5. Eluent for quantitative elution was 10 mL of 2 M HCl. The preconcentration factor of the method, detection limit (3s/b, µg L -1 ) and relative standard deviation values were found to be 25, 4.59 and 1%, respectively. In order to verify the accuracy of the method, two certified reference materials (TMDA 54.4 lake water and SRM 1568a rice flour) were analyzed. The results obtained were in good agreement with the certified values. The method was successfully applied to the determination of Fe(III) ions in water and food samples.

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Solid phase extractive preconcentration of silver from aqueous samples

Cited by 23 publications

References 21 publications

Crystal Structure and Cyclic Voltammetric Studies on the Metal Complexes of N-(Dimethylcarbamothioyl)-4-fluorobenzamide

Crystal Structure and Cyclic Voltammetric Studies on the Metal Complexes of N-(Dimethylcarbamothioyl)-4-fluorobenzamide

Solid Phase Selective and Extractive Preconcentration of Silver Ion from Aqueous Samples on Modified Silica Gel with 5-(4-Dimethylaminobenzylidene)-Rhodanine; Prepared by Sol-Gel Method

Preconcentration and Determination of Fe(III) from Water and Food Samples by Newly Synthesized Chelating Reagent Impregnated Amberlite XAD-16 Resin

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