Application of modified multiwalled carbon nanotubes as a sorbent for simultaneous separation and preconcentration trace amounts of Au(III) and Mn(II)

Shamspur, Tayebeh; Mostafavi, Ali

doi:10.1016/j.jhazmat.2009.03.028

Cited by 98 publications

(35 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is obvious that flow rate of sample is an important parameter that controls the time of analysis and affects the retention of analyte ions on the sorbent [28,29]. While the recovery increases with the decreasing flow rate, the preconcentration time increases [28,29].…”

Section: Effect Of Sample and Eluent Flow Ratementioning

confidence: 99%

See 1 more Smart Citation

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

Roushani¹,

Baghelani²,

Abbasi³

et al. 2016

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

ABSTRACT.A novel method using a packed column with perlite as a new sorbent has been developed for preconcentration of trace amounts of zinc and cadmium prior to their determination by flame atomic absorption spectrometry. Several factors that may be affected on the solid phase extraction (SPE) process, such as pH, sample volume, flow rate, volume and concentration of eluent were studied and optimized. Linearity was maintained between 0.001-0.1 µg mL −1 for zinc, and 0.001-0.3 µg mL −1 for cadmium. Detection limits based on 3Sb for zinc and cadmium were 1.8 and 1.6 ng mL −1 , respectively. The relative standard deviations of eight replicate measurements of 0.02 µg mL −1 of zinc and 0.05 µg mL −1 of cadmium ions were 2.1% and 1.8%, respectively. Finally, the developed method was successfully applied to extraction and determination of the zinc and cadmium ions in the water and food samples and satisfactory results were obtained.

show abstract

Section: Effect Of Sample and Eluent Flow Ratementioning

confidence: 99%

“…While the recovery increases with the decreasing flow rate, the preconcentration time increases [28,29]. Therefore, to obtain the quantitative recovery and to decrease the preconcentration time, the sample flow rate was investigated in the range 0.5 -5 mL min -1 .…”

Section: Effect Of Sample and Eluent Flow Ratementioning

confidence: 99%

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

Roushani¹,

Baghelani²,

Abbasi³

et al. 2016

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

show abstract

“…Since the pH of the aqueous solutions is an important analytical factor in solid phase extraction studies of metal ions [39], the influence of pH on the recovery of analyte ions was examined in the pH range of 2-10 by using diluted solutions of HNO 3 and NaOH or proper buffers. As can be seen from Figure 1, Ni(II) ions were quantitatively recovered at pH range of 5-10, while Pd(II) ions were recovered at pH range of 6-9.…”

Section: Effect Of the Sample Phmentioning

confidence: 99%

“…The measurement of breakthrough volume is important in solid phase extraction because breakthrough volume represents the sample volume that can be preconcentrated without loss of analyte during elution of the sample [39]. The volume of the first aqueous phase, containing a fixed amount of the analytes (10.0 µg Ni(II) and 10.0 µg Pd(II)), was varied in the range of 50.0-1000.0 mL under the optimum conditions, keeping other variables constant, and was passed through column for preconcentration.…”

Section: Breakthrough Volumementioning

confidence: 99%

Removal of nickel(II) and palladium(II) from surface waters

Sabermahani¹,

Saeidi²,

Sharifzade³

2012

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

ABSTRACT. A new sorbent was prepared using alumina and 5-Br-PADAP, and its adsorption ability for the removal of Ni(II) and Pd(II) from different waters was investigated. The procedure is based on retention of the analytes on the alumina load with 5-Br-PADAP at pH ~ 6. The separation/preconcentration conditions for the quantitative recoveries were investigated. The limit of detections (LOD) based on three times the standard deviations of the blank, were 0.187 and 0.253 ng mL -1 for Ni(II) and Pd(II), respectively. Obtained sorption capacities for 1 g sorbent were 6.0 mg Ni(II) and 11.0 mg Pd(II). The linearity was maintained in the concentration range of 0.625 to 6.0 ng mL -1 for Ni(II) and 0.416 to 7.0 ng mL -1 for Pd(II) in the original solution. Eight replicate determinations of a mixture containing 2.0 µg mL -1 each of the elements in the final solution gave relative standard deviation of ±0.82 and ±1.12% for Ni(II) and Pd(II), respectively. The proposed method was successfully applied to the determination trace amounts of Ni(II) and Pd(II) in the surface water samples.

show abstract

“…It was observed that bigger cations are more adsorbed on L-tyrosineCNTs, taking into account the formation of CuOH + and NiOH + at pH 9.0. The preconcentration of Au(II) and Mn(II) in aqueous medium using MWCNTs modified with N,N´-bis(2-hydroxybenzylidene)-2,2´(aminophenylthio)ethane with determination by flame atomic absorption spectrometry was described by Shamspur & Mostafavi, 2009. These metal ions were quantitatively recovered at pH 6.0.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Histidine Functionalized Multiwalled Carbon Nanotubes for Improvement in the Sensitivity of Cadmium Ions Determination in Flow Analysis

Lima¹,

Oliveira²,

Ohara³

et al. 2011

Carbon Nanotubes - From Research to Applications

View full text Add to dashboard Cite

Application of modified multiwalled carbon nanotubes as a sorbent for simultaneous separation and preconcentration trace amounts of Au(III) and Mn(II)

Cited by 98 publications

References 32 publications

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

Removal of nickel(II) and palladium(II) from surface waters

Evaluation of Histidine Functionalized Multiwalled Carbon Nanotubes for Improvement in the Sensitivity of Cadmium Ions Determination in Flow Analysis

Contact Info

Product

Resources

About