Preconcentration and speciation of thallium by ferrofluid based dispersive solid phase extraction and flame atomic absorption spectrometry

Firouzabadi, Zahra Dehghani; Shabani, Ali Mohammad Haji; Dadfarnia, Shayessteh; Ehrampoush, Mohammad Hassan

doi:10.1016/j.microc.2016.10.025

Cited by 43 publications

(17 citation statements)

References 39 publications

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“…Practically, no extraction for the metals investigated was observed for pH values between 1-3. Low pH values make the surface of the nanoparticle positive, leading to low metal retention [25][26][27]. The analytical signals for all metals increase significantly from pH 5 and highest extractions were obtained in the pH range of 5-7.…”

Section: Resultsmentioning

confidence: 99%

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Almeida¹,

Meira²,

Dias³

et al. 2019

Br J Anal Chem

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Determination of Cu, Cd, Pb and V in sugar cane spirit samples by EDXRF after preconcentration using CoFe 2 O 4 A method for the determination of Cu, Cd, Pb and V in Brazilian sugarcane spirit ("cachaça" in Brazil) using CoFe 2 O 4 nanoparticles impregnated with 1-(2-pyridylazo)-naphthol (PAN) for extraction of the metals with posterior determination by X-ray fluorescence spectrometry directly in the solid phase is described. The recommended conditions for extraction were: pH 6.0 (1.0 mol L −1 hexamethylenetetramine (HMTA)/ nitric acid buffer solution); sample volume, 25 mL; and nanoparticle mass, 100 mg. The precisions for the determination of each element, expressed as relative standard deviations (RSD) of standard solutions containing 0.20 mg L −1 of each analyte, were 1.5, 1.8, 1.2 and 2.9% (n = 10), respectively. Limits of detection of 0.032, 0.038, 0.016 and 0.028 mg L-1 were obtained for Cu, Cd, Pb and V, respectively. Addition and recovery tests were performed, and the results ranged from 97 to 115% for Cu, 85 to 115% for Cd, 85 to 99% for Pb and 85 to 110% for V. The method was successfully applied in extraction and determination of Cd, Pb, Cu and V in sugar cane spirit samples from Brazil.

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Section: Resultsmentioning

confidence: 99%

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Almeida¹,

Meira²,

Dias³

et al. 2019

Br J Anal Chem

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“…new alternatives for their treatment [5,6]. There are several methods available to detect trace metal ions such as chemical precipitation/coprecipitation [7], liquid-liquid extraction [8], and solid phase extraction (SPE) [9]. SPE has been considered as the most efficient technique compared with the others for its simplicity, economics, rapidity, and consumption of small volume of reagents.…”

Section: Nano-chamomile Waste As a Low-cost Biosorbent For Rapid Remomentioning

confidence: 99%

“…The kinetics of metals adsorption on NCW is also described as pseudo-second order Eq. (7) [48]: t/q t = 1/k 2 q e 2 + 1/q e t (7) where k 2 (gmmoL -1 min -1 ) is the constant of pseudo-second-order rate. The value of q e and k 2 are experimentally determined from the slope and the intercept of the plot t/q t versus t. As shown in Fig.…”

Section: Kinetic Studiesmentioning

confidence: 99%

Nano-chamomile waste as a low-cost biosorbent for rapid removal of heavy metal ions from natural water samples

2019

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I N this study, we report the feasibility of using nano chamomile waste (NCW) as a selective solid phase extractor for heavy metal ions. The experimental parameters including pH (1.0-6.0), metal ion concentration (10-100 µmole), adsorbent dose (10-1000 mg), and biosorption time (0.5-90 min) were altered by using the batch technique to optimize the maximum capacity of this new biosorbent. The experimental data by NCW agreed with both Freundlich and Langmuir models (R 2 =0.999) with maximum uptake capacities of 621.6 mgg-1 (3 mmolg-1) for Pb (II), 163.9 mgg-1 (2.58 mmolg-1) for Cu (II), and 522.7 mgg-1 (9.36 mmolg-1) for Fe (III). In addition, the values of metal uptake as a function of time agreed with the kinetic pseudosecond-order model. The kinetic experiments confirmed the fast accessibility of metal ions to the biosorbent surface resulting in equilibrium within 30 s. NCW was also characterized using FT-IR spectra and the crystallinity of the biosorbent was characterized using X-ray diffraction (XRD). The morphological characterization and particle size of NCW were obtained using SEM and TEM, respectively. Our method was investigated to measure Pb (II), Cu (II), and Fe (III) with a certain spiked amounts in natural water samples such as groundwater (GW), drinking tap water (DTW), natural drinking water (NDW), Nile River water (NRW), seawater (SW), and wastewater (WW). A removal efficiency of ≥98% was obtained for all collected samples using batch experiments and without matrix interferences. Considering its cheap source, simple, economic and fast uptake process, NCW can be used as a low-cost nano biosorbent for the removal of metal ions from natural water samples.

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“…The main preparation procedure of FFs is quite simple: the direct mixing of the precursors (stabilized MNPs and carrier, or MNPs, stabilizer, and carrier) for a certain time, to ensure the formation of a quite homogeneous colloidal suspension. Ultrasonic energy is the most common assistance method used to ensure such uniform and energic mixing [5,9,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In any case, the preparation of any FF clearly requires the synthesis of the MNPs, and, in several cases, the surface modification of the MNPs, and/or the synthesis of the carrier solvent if it is not commercially available.…”

Section: Introductionmentioning

confidence: 99%

The Use of Ferrofluids in Analytical Sample Preparation: A Review

2021

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Ferrofluids (FFs) constitute a type of tunable magnetic material, formed by magnetic nanoparticles suspended in a liquid carrier. The astonishing magnetic properties of these materials and their liquid nature have led to their extended use in different applications, including fields such as magnetochemistry, optics, and biomedicine, among others. Recently, FFs have been incorporated as extractant materials in magnetic-driven analytical sample preparation procedures, thus, permitting the development of different applications. FF-based extraction takes advantage of both the magnetic susceptibility of the nanoparticles and the properties of the liquid carrier, which are responsible for a wide variety of interactions with analytes and ultimately are a key factor in achieving better extraction performance. This review article classifies existing FFs in terms of the solvent used as a carrier (organic solvents, water, ionic liquids, deep eutectic solvents, and supramolecular solvents) while overviewing the most relevant analytical applications in the last decade.

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Preconcentration and speciation of thallium by ferrofluid based dispersive solid phase extraction and flame atomic absorption spectrometry

Cited by 43 publications

References 39 publications

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Nano-chamomile waste as a low-cost biosorbent for rapid removal of heavy metal ions from natural water samples

The Use of Ferrofluids in Analytical Sample Preparation: A Review

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