Multi‐Walled Carbon Nanotubes as Sorbent for Flow Injection On‐Line Microcolumn Preconcentration Coupled with Flame Atomic Absorption Spectrometry for Determination of Cadmium and Copper

Liang, Huading; Han, Dandan

doi:10.1080/00032710600755579

Cited by 58 publications

(17 citation statements)

References 24 publications

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“…Comparison of the results obtained in this study with some recent studies using multiwalled carbon nanotubes as the solid phase extractor [44][45][46][47][48][49][50][51] was given in Table 5. The validity of the proposed method using a certified reference material proved its application.…”

Section: Resultsmentioning

confidence: 95%

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Karimipour

Ghaedi

Sahraei

et al. 2011

Biol Trace Elem Res

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In this study, a new sorbent based on the gold nanoparticle loaded in activated carbon (Au-NP-AC) was synthesized and modified by bis(4-methoxy salicylaldehyde)-1,2-phenylenediamine (BMSAPD). This sorbent, which is abbreviated as Au-NP-AC-BMSAPD, has been applied for the enrichment and preconcentration of trace amounts of Co(2+), Cu(2+), Ni(2+), Fe(2+), Pb(2+), and Zn(2+) ions in real samples. All metal ions under study were retained on the Au-NP-AC-BMSAPD sorbent by complexation of the ions with the BMSAPD ligand, providing an efficient preconcentration fashion. The retained metal ions were then eluted from the sorbent by HNO(3) and detected by flame atomic absorption spectrometry. The analytical parameters including pH, amount of ligand, and the nature of the eluent and solid phase were evaluated to obtain the optimum condition for the preconcentration factor. Following the optimum conditions, a preconcentration factor of 200 was obtained for all the metal ions under study with detection limits of 1.4-2.6 ng mL(-1). The method has been successfully applied for the extraction and determination of the ion content in the same real samples with recoveries in the range of 95-99.6% and a relative standard deviation lower than 4.0%.

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Section: Resultsmentioning

confidence: 95%

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Karimipour

Ghaedi

Sahraei

et al. 2011

Biol Trace Elem Res

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“…A survey of the literature reveals that, up to now, various adsorbents such as C18 [6], resins like Muromac A-1 [7], CPG/quinolin-8-ol [8], Amberlite XAD-2 [9,10], Chelex-100 [11,12], polyurethane foam [13,14], multi walled carbon nanotubes [15], PTFE beads and activated carbon [16 -21] have been investigated for online SPE preconcentration of cadmium before FAAS detection. Among those, activated carbon, the lowest cost material, has been proven to be a good adsorbent for numerous metal cations and complexes in water.…”

Section: Introductionmentioning

confidence: 99%

Online Preconcentration and Determination of Trace Levels Cadmium in Water Samples Using Flow Injection Systems Coupled with Flame AAS

Zhao

Liang

Yan

et al. 2010

CLEAN Soil Air Water

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A rapid and sensitive method for the determination of trace levels cadmium in water samples by flame atomic absorption spectrometry was developed. It is based on the online sorption of Cd(II) ions on a microcolumn packed with HCl treated bamboo charcoal. In a pH range of 5.0 -7.5, Cd(II) ions were effectively retained on the microcolumn, which exhibited fast kinetics, permitting the use of high sample flow rates up to at least 12.8 mL/min without the loss of retention efficiency. The retained Cd(II) ions were quantitatively eluted with HCl (2.0 mol/L) for an online determination. With a preconcentration time of 80 s at a sample loading flow rate of 8.6 mL/min, a sensitivity enhancement factor of 63 was obtained compared with the slope of the linear portion of the calibration curves before and after preconcentration. The calibration graph using the preconcentration system for cadmium was linear with a correlation coefficient of 0.9997, at levels from 1 -40 ng/mL. The precision (RSD) for 11 replicate measurements were 3.2% for the determination of 5 ng/mL Cd(II) and 1.8% for 20 ng/mL Cd(II), respectively, and the detection limit (3s) was 0.36 ng/mL. The accuracy was assessed through the determination of a certified reference material, and also through recovery experiments.

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“…MWCNTs were also used for preconcentration of metal ions. Liang et al have used MWCNTs for preconcentration of rare earth elements [24], cadmium, copper [25,26], and silver ions [27]. Tarley et al [28] reported the use of a simple flow injection mini-column preconcentration system with MWCNTs for determination of cadmium.…”

Section: Introductionmentioning

confidence: 99%

Effect of dimensions of multi-walled carbon nanotubes on its enrichment efficiency of metal ions from environmental waters

El‐Sheikh

Sweileh

Al‐Degs

2007

Analytica Chimica Acta

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Multi‐Walled Carbon Nanotubes as Sorbent for Flow Injection On‐Line Microcolumn Preconcentration Coupled with Flame Atomic Absorption Spectrometry for Determination of Cadmium and Copper

Cited by 58 publications

References 24 publications

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Online Preconcentration and Determination of Trace Levels Cadmium in Water Samples Using Flow Injection Systems Coupled with Flame AAS

Effect of dimensions of multi-walled carbon nanotubes on its enrichment efficiency of metal ions from environmental waters

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