Retraction notice to “Solid phase extraction method for the determination of lead, nickel, copper and manganese by flame atomic absorption spectrometry using sodium bispiperdine-1,1′-carbotetrathioate (Na-BPCTT) in water samples” [J. Hazard. Mater. 146 (1–2) (2007) 131–136]

Rekha, D.; Kanchi, Suvardhan; Kumar, J. Dilip; Subramanyam, Prakash; Prasad, P. Reddy; Lingappa, Y.; Chiranjeevi, P.

doi:10.1016/j.jhazmat.2007.12.056

Cited by 6 publications

(5 citation statements)

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“…All discussed values are given in detail in Table 4. The obtained detection limits are similar to those obtained by WDXRF 41 or even better than those obtained by EDXRF 42,43 aer preconcentration with MWCNTS and portable XRF with APDC, 44 similar to those obtained by F-AAS commonly applied aer preconcentration using other sorbent materials 45,46 and EDXRF with APDC. 47 Moreover, the relative standard deviation (RSD) for three replicate measurements of solutions containing 0.5 mg mL À1 of Pb 2+ , Cd 2+ , Ni 2+ and Co 2+ was not higher than 5%.…”

Section: Analytical Performancesupporting

confidence: 80%

Determination of trace amounts of Pb, Cd, Ni and Co by wavelength-dispersive X-ray fluorescence spectrometry after preconcentration with dithizone functionalized graphene

et al. 2014

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In this paper, a new simple and sensitive method is developed for the preconcentration of trace amounts of lead (Pb), cadmium (Cd), nickel (Ni) and cobalt (Co) ions using graphene as a solid sorbent. It was found that functionalizing graphene with dithizone could greatly improve the preconcentration capability of graphene.After sorption, the graphene adsorbed with the metal ions was collected onto a filter, and then the preconcentrated elements were directly determined by wavelength-dispersive X-ray fluorescence spectrometry (WDXRF). With the dithizone functionalized graphene, excellent enrichment factors ranging from 926 to 985 were obtained for Pb 2+ , Cd 2+ , Ni 2+ and Co 2+ . Parameters affecting the extraction process (pH of the analyte solution, stirring time, the volume of the sample, complexing agent, adsorption capacity), and the effect of foreign metals were evaluated. Under optimum conditions, the calibration graphs were linear in the range of 0.01 mg mL À1 to 3.0 mg mL À1 with a correlation coefficient better than 0.99, detection limits of Pb 2+ , Cd 2+ , Ni 2+ and Co 2+ were 2.0 ng mL À1 , 6.1 ng mL À1 , 1.1 ng mL À1 , and 1.3 ng mL À1 , respectively. Quantitative recoveries (>95%) were obtained for all four studied metal ions. The proposed method was successfully applied to measure the trace amounts of Pb 2+ , Cd 2+ , Ni 2+ and Co 2+ in different types of environmental water samples, and the relative expanded uncertainty of measurement of these four ions is smaller by 16%.

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Section: Analytical Performancesupporting

confidence: 80%

Determination of trace amounts of Pb, Cd, Ni and Co by wavelength-dispersive X-ray fluorescence spectrometry after preconcentration with dithizone functionalized graphene

et al. 2014

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“…However, due to the high limit of detection (LOD) of this technique, conventional separation enrichment procedures, mainly the solid phase extraction (SPE) ones, have been frequently used to overcome interferences from matrix elements and to improve the limits of detection. 13,14 In particular, the adsorbent preconcentration flow injection systems have been seen as a very useful tool because of the simplicity, high preconcentration factors, easy regeneration of the solid phase, low consumption of sample and reagents and high sample throughput. 15 Although SPE associated with flow injection systems has been very well recognized as an efficient analytical tool for improving the detectability of spectroanalytical techniques, its success depends on selective and adsorptive performance of adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

Zappielo¹,

Nanicuacua²,

Santos³

et al. 2016

Journal of the Brazilian Chemical Society

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Carbon black (CB) grafted with 3-mercaptopropyltrimethoxysilane (3-MPTMS) was used as solid phase extractor for Cd 2+ in a flow injection system coupled to flame atomic absorption spectrometry (FAAS). The influence of pH, buffer concentration, preconcentration flow rate and eluent concentration on preconcentration of Cd 2+ were investigated by means of chemometric tools. The characterization of the adsorbent chemically modified was performed by Fourier transform infrared, scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis, Raman spectroscopy and textural analysis. To perform the on-line preconcentration, 20.0 mL of a pH 7.0 Cd 2+ solution at a flow rate of 4.0 mL min −1 was loaded through 30.0 mg of modified CB and then eluted with 1.0 mol L −1 HCl toward the FAAS instrument. The limits of detection and quantification were found to be 0.20 and 0.66 µg L −1 , respectively. Addition and recovery tests carried out in real samples (mineral, tap and saline waters, and cigarette sample) and the analysis of certified reference material (TORT-2, lobster hepatopancreas reference) attested the applicability of proposed method.

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“…SPE offers a number of important benefits in comparison with laborious classical liquid-liquid extraction, such as simple and fast extractor system, reduced solvent usage and exposure, low disposal costs, high concentration factor and ability of treating large volume samples free from contamination (Arpa and Bectas, 2006;Rekha et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Separation and preconcentration of Arsenic(III) ions from aqueous media by adsorption on MWCNTs

Tavakkoli

Habibollahi

Tehrani

2017

Arabian Journal of Chemistry

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A simple and sensitive method using mini-column packed with multi-walled carbon nanotubes (MWCNTs) combined with graphite furnace atomic absorption spectrometry (GFAAS) for preconcentration and determination of ultra trace amounts of As(III) in an aqueous medium is proposed. The procedure is based on the solid phase extraction of the As(III)-sodium diethyldithiocarbamate (As-NaDDTC) chelate on MWCNTs. Various parameters such as the effect of pH, eluent type and volume, amount of sorbent, and matrix effects on the quantitative recoveries of analyte ions were evaluated. It was found that sorption is quantitative and desorption occurs with 4.0 mL of 3.0 mol L À1 HNO 3 in acetone. The limit of detection of the method was 0.008 ng mL À1 for GFAAS with enrichment factor of 125 and the relative standard deviation (RSD) 0.97% (n = 8, C = 10 ng mL À1 ). This method has been applied to the determination of ultra trace As(III) in water and rice plant and its ash successfully.

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Retraction notice to “Solid phase extraction method for the determination of lead, nickel, copper and manganese by flame atomic absorption spectrometry using sodium bispiperdine-1,1′-carbotetrathioate (Na-BPCTT) in water samples” [J. Hazard. Mater. 146 (1–2) (2007) 131–136]

Cited by 6 publications

References 0 publications

Determination of trace amounts of Pb, Cd, Ni and Co by wavelength-dispersive X-ray fluorescence spectrometry after preconcentration with dithizone functionalized graphene

Determination of trace amounts of Pb, Cd, Ni and Co by wavelength-dispersive X-ray fluorescence spectrometry after preconcentration with dithizone functionalized graphene

Solid Phase Extraction to On-Line Preconcentrate Trace Cadmium Using Chemically Modified Nano-Carbon Black with 3-Mercaptopropyltrimethoxysilane

Separation and preconcentration of Arsenic(III) ions from aqueous media by adsorption on MWCNTs

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