Solid phase extraction preconcentration of cobalt and nickel with 5,7-dichloroquinone-8-ol embedded styrene–ethylene glycol dimethacrylate polymer particles and determination by flame atomic absorption spectrometry (FAAS)

Praveen, R.S.; Daniel, Sobhi; Rao, T. Prasada

doi:10.1016/j.talanta.2004.11.026

Cited by 58 publications

(20 citation statements)

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“…1, the optimum mass of initiator was 40.0 mg. This mass is close to that reported by other authors (Romaní et al, 2008;Romaní et al, 2009a;Ersoz et al, 2004;Otero et al, 2009;Praveen et al, 2005) but lower than that in some reports (Gladis and Rao, 2004;Romaní et al, 2009b). There was no polymer formed when 10.0 mg of initiator were used.…”

Section: Optimisation Of Template Monomer Porogen Crosslinker Crosupporting

confidence: 88%

Optimal synthesis of a Ni(II)-dimethylglyoxime ion-imprinted polymer for the enrichment of Ni(II) ions in water, soil and mine tailing samples

Rammika¹,

Darko²,

Torto³

2012

WSA

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A Ni(II)-dimethylglyoxime ion-imprinted polymer {Ni(II)-DMG IIP} was optimised by the uniform design experimental method and used to adsorb Ni(II) ions from water, soil and mine tailing samples. This aimed to improve the performance of this ion-imprinted polymer in trapping Ni(II) ions from soil and mine tailing samples which are characterised by complex matrices. The optimisation was carried out by varying the molar ratios of monomer to crosslinker to porogen and template to ligands, as well as by keeping these parameters constant and varying the concentrations of initiator, 2,2'-azobisisobutyronitrile (AIBN). The optimal molar ratios of crosslinker to monomer, monomer to template and nickel(II) sulphate hexahydrate (NiSO 4 .6H 2 O) to 4-vinylpyridine to dimethylglyoxime were found to be 3.3:1.0, 0.6:1.0 and 1.0:0.6:3.6, respectively, with 30 mg and 8 mℓ as the optimum amounts of initiator and porogen, respectively. Through this optimisation, extraction efficiency for Ni(II) increased from 98 to 100% in aqueous samples. The extraction efficiencies for the soil and mine tailing samples were 98-99% and 99%, respectively, with an enrichment factor of 2 in mine tailing samples and ranging from 27 to 40 in soil samples. The method displayed good accuracy, as it was validated with certified reference materials (SEP-3 and BCR-142R) and the values obtained were close to the certified ones. The improved quality of results obtained from water, soil and mine tailing samples showed that the uniform design experimental method is effective and efficient for optimising imprinted polymers using a lower number of experiments performed.

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Section: Optimisation Of Template Monomer Porogen Crosslinker Crosupporting

confidence: 88%

Optimal synthesis of a Ni(II)-dimethylglyoxime ion-imprinted polymer for the enrichment of Ni(II) ions in water, soil and mine tailing samples

Rammika¹,

Darko²,

Torto³

2012

WSA

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“…Also in the presence of more than 3 % of water-miscible organic solvents such as acetone phase separation does not occur. Several SPE preconcentration procedures for cobalt have been reported using various sorbents (Blitz-Raith et al, 2007;Ghaedi et al, 2007;Praveen et al, 2005;Yang et al, 2002). DLLME is a type of solvent microextraction (SME), which has been developed in 2007.…”

Section: Cobalt; the Occurrence Benefits And Applications Exposure mentioning

confidence: 99%

Cold-Induced Aggregation Microextraction: A Novel Sample Preparation Technique Based on Ionic Liquids for Preconcentration of Cobalt Prior to Its Determination by Fiber Optic-Linear Array Detection Spectrophotometry in Real Water Samples

Gharehbaghi¹,

Shemirani²,

Farahani³

et al. 2011

Ionic Liquids: Applications and Perspectives

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“…Such characteristics relies to the choice of a material with high chemical and mechanical stability and high adsorption capacity. 16,17 Among the solid phase adsorbents, silica gel (SiO 2 ) matrix is widely utilized due to its high mechanical stability at high pressure and low swellability in different solvents. However, silica-based materials have chemical limitations regarding the adsorptive capacity against metallic ions, as well as low chemical stability in high acid and/or high alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS

Tarley¹,

Scheel²,

Ribeiro³

et al. 2017

J. Braz. Chem. Soc.

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A new online solid phase preconcentration method using the new SiO 2 /Al 2 O 3 /SnO 2 ternary oxide (designated as SiAlSn) as chelating agent free-solid phase extractor (CAF-SPE) coupled to flame atomic absorption spectrometry (FAAS) for Pb 2+ determination at trace levels in different kind of samples is proposed. The solid adsorbent has been characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron miscroscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray fluorescence spectroscopy (XRF) and textural data. The method involves the preconcentration using time-based sampling of Pb 2+ solution at pH 4.3 through 100.0 mg of packed adsorbed into a mini-column under flow rate of 4.0 mL min -1 during 5 min. The elution step was accomplished by using 1.0 mol L -1 HCl. A wide range of analytical curve (5.0-400.0 µg L -1 ), high enrichment factor (40.5), low consumption index (0.5 mL) and low limits of quantification and detection, 5.0 and 1.5 µg L -1 , respectively, were obtained with the developed method. Practical application of method was tested on water samples, chocolate powder, Ginkgo biloba and sediment (certified reference material). On the basis of the results, the SiAlSn can be considered an effective adsorbent belonging to the class of CAF-SPE for Pb 2+ determination from different matrices.Keywords: lead, online solid phase extraction, SiO 2 /Al 2 O 3 /SnO 2 , flame atomic absorption spectrometry, food and water samples IntroductionLead contamination has been considered one of the most environmental concern worldwide due to numerous acute and chronic adverse effects caused by the element. 1,2 To the population in general, which is not occupationally exposed, water and food are significant sources of exposure to lead. 2 The most common lead contamination pathways to water are the household plumbing corrosion and anthropic pollution, while to food are the development of plants grown in soil containing high amount of lead and the accidental additive picked up during food processing. [3][4][5][6] Due to its high degree of toxicity and the effects caused to the ecosystem, a rigid monitoring of the activities involving this metal is required.According to World Health Organization (WHO), 6-8 the health-based guideline established value for lead in drinking water is 10.0 µg L -1 , while for food, the seventy-third report of the Joint Food Agriculture Organization/WHO Expert Committee on Food Additives estimated the mean dietary Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO 2 /Al 2 O 3 /SnO 2 Ternary Oxide J. Braz. Chem. Soc. 1226 exposure per day and body weight for children (aged about 1-4 years) and to adults being in the range 0.03-9.00 and 0.02-3.00 µg kg -1 , respectively. The Brazilian Ministry of Health 9 and CONAMA resolution No. 357 (Brazil National Environment Council) 10 established the maximum allowable lead content in freshwater as 30.0 µg L -1 , while for drinking water this index reduces to 10.0 µg L -1 and effluents release...

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Solid phase extraction preconcentration of cobalt and nickel with 5,7-dichloroquinone-8-ol embedded styrene–ethylene glycol dimethacrylate polymer particles and determination by flame atomic absorption spectrometry (FAAS)

Cited by 58 publications

References 40 publications

Optimal synthesis of a Ni(II)-dimethylglyoxime ion-imprinted polymer for the enrichment of Ni(II) ions in water, soil and mine tailing samples

Optimal synthesis of a Ni(II)-dimethylglyoxime ion-imprinted polymer for the enrichment of Ni(II) ions in water, soil and mine tailing samples

Cold-Induced Aggregation Microextraction: A Novel Sample Preparation Technique Based on Ionic Liquids for Preconcentration of Cobalt Prior to Its Determination by Fiber Optic-Linear Array Detection Spectrophotometry in Real Water Samples

Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS

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