Solid-phase extraction with multiwalled carbon nanotubes prior to photochemical generation of cadmium coupled to high-resolution continuum source atomic absorption spectrometry

Stanisz, Ewa; Krawczyk, Magdalena; Matusiewicz, Henryk

doi:10.1039/c4ja00278d

Cited by 10 publications

(2 citation statements)

References 34 publications

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“…Multi-walled carbon nanotubes (MWCNTs) have received great attention due to their exceptional electronic, mechanical, thermal, chemical properties and significant potential applications in many fields [18]. Owing to their large surface area and high reactivity, MWCNTs based adsorbents have been used for solid phase extraction and preconcentration of organic compounds and metal ions [19,20]. Compared with traditional SPE sorbents, MWCNTs offer a significantly higher surface area-to-volume ratio and a short diffusion route, resulting in high extraction capacity, low extraction time and high extraction efficiencies [21].…”

Section: Introductionmentioning

confidence: 99%

Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes

Zolfonoun¹

2019

Anal. Method Environ. Chem. J.

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A solid-phase extraction method based on multi-walled carbon nanotubes (MWCNTs) was applied for the preconcentration of L-tryptophan prior to its spectrofluorometric determination. Due to the high surface area of MWCNTs, satisfactory concentration factor and extraction recovery can be achieved with only 10 mg MWCNTs in 5 min. The effects of pH, sorbent amount, eluent type and time on the recovery of the analyte were investigated. Under the optimum conditions, the detection limit for L-tryptophan was 8.9 ng mL−1. The precision of the method, evaluated as the relative standard deviation obtained by analyzing of 10 replicates, was 2.6%. The practical applicability of the developed method was examined using wheat and barley samples.

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Section: Introductionmentioning

confidence: 99%

Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes

Zolfonoun¹

2019

Anal. Method Environ. Chem. J.

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“…[14][15][16] Carbon nanotubes (CNTs) opened a new investigation area in the development of alternative coating materials for SPE, since their special properties make them very attractive to improve the performance of this technique. 17,18 Compared with traditional SPE sorbents, MWCNTs offer a significantly higher surface area-to-volume ratio and a short diffusion route, resulting in high extraction capacity, low extraction time and high extraction efficiencies. 19 1-(2-Pyridylazo)-2-naphthol (PAN) is a complexometric indicator and spectrophotometric reagent for determination of transition metal ions.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Rare Earth Elements by ICP OES After On-Line Enrichment Using Multi-Walled Carbon Nanotubes Coated Cellulose Acetate Membrane

Zolfonoun¹,

Yousefi²

2016

Journal of the Brazilian Chemical Society

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This study investigates application of multi-walled carbon nanotubes coated cellulose acetate membrane for on-line extraction and preconcentration of some rare earth elements (Y, La, Ce, Nd, Sm, Gd and Dy) prior to their determination by inductively coupled plasma optical emission spectrometry. Sample solutions containing rare earth elements (pH: 6.0) and l-(2-pyridylazo) 2-naphtol (4.0 × 10 -5 mol L -1 ) were passed through the membrane (flow rate: 5.0 mL min -1). The adsorbed cations were subsequently eluted from the membrane and transferred into the plasma with nitric acid solution (flow rate: 3.0 mL min -1 ) for simultaneous determination of them. The effect of different experimental parameters on the performance of the method were studied and discussed. Under the optimized conditions and preconcentration of 25 mL of sample, the enrichment factors of 185-201 and the detection limits of 0.05-0.3 μg L -1 were obtained.

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Effect of additives on cadmium chemical vapor generation and reliable quantification of generation efficiency

Sagapova

Musil

Kodríková

et al. 2021

Analytica Chimica Acta

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Solid-phase extraction with multiwalled carbon nanotubes prior to photochemical generation of cadmium coupled to high-resolution continuum source atomic absorption spectrometry

Cited by 10 publications

References 34 publications

Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes

Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes

Simultaneous Determination of Rare Earth Elements by ICP OES After On-Line Enrichment Using Multi-Walled Carbon Nanotubes Coated Cellulose Acetate Membrane

Effect of additives on cadmium chemical vapor generation and reliable quantification of generation efficiency

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