Determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry after preconcentration by Escherichia coli immobilized on sepiolite

H, Bağ; Ar, Türker; Lale, Mustafa

doi:10.1016/s0039-9140(00)00289-7

Cited by 59 publications

(17 citation statements)

References 12 publications

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“…The bacterium Escherichia coli was maintained, cultivated, grown and prepared as a dry bacterial powder according to a procedure given by Bag et al 20 Commercially available Amberlite XAD-4 was prepared as a substrate by washing successively with methanol, water, 1 mol l -1 HCl and water, to remove organic and inorganic contaminants.…”

Section: Preparation Of Solid-phase Extractormentioning

confidence: 99%

“…Bag et al 20 studied E. coli immobilized on sepiolite for the preconcentration of Cu, Zn, Fe, Ni and Cd. The results indicated that the proposed solid phase is suitable for the preconcentration of analytes from alloys.…”

Section: Introductionmentioning

confidence: 99%

“…In other studies, algae cells 23 and bacteria, such as E. coli and P. putida, 24 have been used as biomass. Robles et al 24 In previous studies, various materials, such as controlled pore glass (CPG), 27 silica gel 28 and sepiolite 20 have been used as substrates for the immobilization of microorganisms.…”

Section: Introductionmentioning

confidence: 99%

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Use of Escherichia coli Immobilized on Amberlite XAD-4 as a Solid-Phase Extractor for Metal Preconcentration and Determination by Atomic Absorption Spectrometry

Türker

Baytak

2004

ANAL. SCI.

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A sensitive solid-phase extraction technique (SPE) for the enrichment of Fe(III), Co(II), Mn(II) and Cr(III) prior to atomic absorption spectrometric analysis is described. Escherichia coli immobilized on Amberlite XAD-4 was used as a solid-phase extractor. The effects of the pH, amount of solid-phase, eluent type and volume of the sample solution on the recovery of the metal ions were investigated. The effect of diverse ions was also investigated. The recoveries of Fe(III), Co(II), Mn(II) and Cr(III) under the optimum conditions were found to be 99 ± 2, 99 ± 3, 98 ± 2, 98 ± 3%, respectively, at the 95% confidence level. The detection limits of the metal ions were found as to be 2.4, 3.8, 1.3 and 1.7 ng ml -1 for Fe(III), Co(II), Mn(II) and Cr(III) respectively, by applying a preconcentration factor of 25. The proposed enrichment method was applied to the determination of analytes in Atatürk Dam water samples, and alloy samples (RSD < 5%). The accuracy of the method was verified on certified alloy samples (NBS SRM 85b and NBS SRM 59a). The analytes were determined with a relative error lower than 5% in water and alloy samples.

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Section: Preparation Of Solid-phase Extractormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of Escherichia coli Immobilized on Amberlite XAD-4 as a Solid-Phase Extractor for Metal Preconcentration and Determination by Atomic Absorption Spectrometry

Türker

Baytak

2004

ANAL. SCI.

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“…Microorganisms immobilized on sorbents have been used for years for preconcentration and speciation of trace metals [18,19,20,21,22,23,24,25,26,27,28,29] but only recently for pesticide determinations. Martín-Estaban et al [30] used Saccharomyces cerevisiae immobilized on silica gel as a sorbent for the on-line isolation and trace enrichment of desisopropylatrazine, desethylatrazine, hydroxyatrazine, simazine, cynanazine, atrazine, carbaryl, propanil, linuron, and fenamiphos pesticides from environmental water samples before HPLC.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric determination of some pesticides in water samples after preconcentration with Saccharomyces cerevisiae immobilized on sepiolite

Tunçeli

Bağ

Türker

2001

Fresenius J Anal Chem

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A sensitive and selective method for the preconcentration and determination of carbaryl, chlorpyrifos, linuron, and thiram was developed. The column sorption method was used for the preconcentration studies. Several parameters, such as amount of sorbent, pH, flow rate, volume of elution solution, and interferences, that can influence the retention of pesticides on Saccharomyces cerevisiae immobilized on sepiolite were investigated. Results showed that it was possible to achieve quantitative analysis when the sample pH was in the range 4-6 for carbaryl and thiram, 4-8 for linuron and 6 for chlorpyrifos using 100 mL of sample solution containing 20 microg of pesticide and 5 mL of eluent. Recoveries of carbaryl, chlorpyrifos, linuron, and thiram were 93.2 +/- 0.4%, 97.1 -/+ 0.3%, 98.5 +/- 0.4%, and 96.1 +/- 0.2%, respectively, at 95% confidence level under optimum conditions. The capacity of the sorbent was found to be 41, 28, 35, and 46 mg g(-1) for carbaryl, chlorpyrifos, linuron, and thiram, respectively. Saccharomyces cerevisiae immobilized on sepiolite is suitable for repeated use without loss of capacity up to twenty five cycles. The pesticides studied have been determined in river water with high precision and accuracy.

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“…Avariety of solid materials such as modified ion exchange resins [11][12][13] , functionalized resins with chelating reagents 14 , activated carbon 15 , zeolites 16 , cellulose 17 and immobilized microorganisms on sepiolite 18 have been used for preconcentration of trace metals. Microcrystalline naphthalene [19][20][21] and benzophenone 22 have also been used as solid-phase for adsorptive extraction of metal ion complexes.…”

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confidence: 99%

Solid phase extraction of trace Cu(II)using Naphtol-2-(Pyridylazo-2)-1 (PAN) modified Single walled carbon nanotubes (SWCNTs) to Determination by FAAS

Moghimi¹,

Peykani²,

Samadi³

2014

Orient. J. Chem

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A simple, reliable and rapid method for preconcentration and modified solid phase C 18 with Single-Walled Carbon Nanotubes with Naphtol-2-(Pyridylazo-2)-1 (PAN) in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of Naphtol-2-(Pyridylazo-2)-1 (PAN) -modified Single walled carbon nanotubes (SWCNTs) was 50 mg.g -1 and the optimum pH for the quantitative recovery of copper was found as 3.0. The optimum flow rate, sorbent amount and sample volume were1.0 mL.min -1 , 300 mg and 50 mL, respectively. 5 mL of 4 mol.L -1 HNO 3 was the most suitable eluent. The recommended method is simple and reliable for the determination of copper without any notable matrix effect and successfully applied to environmental water samples. The results of this study show that little amount of Cu 2+ ion with the aid of minimum chemical substacnces, in a relatively short amount of time, and with high percentage of recovery, can be isolated and identified. In this method, the detection limits equal to 0.1µg.mL -1 , were achieved with the experiment's relative standard deviation of (n=10) equal to 1.25% factor prior to condensation equating to 125 and the column capacity of 205 µg for each adsorbent.The accuracy of the proposed method was compared with other standard methods, it became clear superiority. Similar experiments on natural samples under optimal conditions have proven the efficiency of this method at an industrial scale.

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Determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry after preconcentration by Escherichia coli immobilized on sepiolite

Cited by 59 publications

References 12 publications

Use of Escherichia coli Immobilized on Amberlite XAD-4 as a Solid-Phase Extractor for Metal Preconcentration and Determination by Atomic Absorption Spectrometry

Use of Escherichia coli Immobilized on Amberlite XAD-4 as a Solid-Phase Extractor for Metal Preconcentration and Determination by Atomic Absorption Spectrometry

Spectrophotometric determination of some pesticides in water samples after preconcentration with Saccharomyces cerevisiae immobilized on sepiolite

Solid phase extraction of trace Cu(II)using Naphtol-2-(Pyridylazo-2)-1 (PAN) modified Single walled carbon nanotubes (SWCNTs) to Determination by FAAS

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