Cloud point extraction for speciation of iron in beer samples by spectrophotometry

Filik, Hayati; Giray, Derya

doi:10.1016/j.foodchem.2011.07.008

Cited by 54 publications

(22 citation statements)

References 29 publications

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“…The CPE as solvent-free and non-polluting method has been applied to separation and preconcentration of environmental and biological samples with a complicated matrix [4].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Simultaneous application of cloud point and solid-phase extraction for determination of Fe(III) and Cu(II) ions by using SnO2 nanopowder in micellar medium

Nekouei

Ulusoy

et al. 2016

Desalination and Water Treatment

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A new approach was developed for sensitive determination of Fe(III) and Cu(II) ions using SnO 2 nanopowder in the micellar medium on the contrary conventional cloud point extraction studies. The presented method contains a combination of solid-phase extraction and cloud point extraction. According to this procedure, the metal ions were firstly retained on modified SnO 2 nanopowder and then passed to the surfactant-rich phase. The effect of experimental variables including pH, concentration of reagents, eluting solution, incubation time, equilibration temperature, sample volume, and effects of interfering ions have been investigated and optimized systematically. The calibration graphs were linear in the range of 0.23-100.00 μg L −1 and 0.30-110.00 μg L −1 for Fe(III) and Cu(II), respectively. Under optimized conditions, the limits of detections were 0.07 and 0.09 μg L −1 for Fe(III) and 0.09 μg L −1 for Cu(II). The proposed method offers satisfactory analytical features by means of combining two different and efficient preconcentration techniques. In addition, the method can be evaluated as an alternative and fast method according to only-surfactant-mediated extractions. The validation of method was carried out by recovery tests and certified reference material (CRM) analysis. The acceptable and compatible results were obtained in the analysis of CRM and real samples.

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“…The CPE as solvent-free and non-polluting method has been applied to separation and preconcentration of environmental and biological samples with a complicated matrix [4].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Simultaneous application of cloud point and solid-phase extraction for determination of Fe(III) and Cu(II) ions by using SnO2 nanopowder in micellar medium

Nekouei

Ulusoy

et al. 2016

Desalination and Water Treatment

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“…The previous literature review conducted to determine the iron element in various samples by using cloud point extraction method that is coupled with different techniques such as: flame atomic absorption spectrometry (FAAS) [12,15,16], UV-visible spectrophotometer [17,18], inductively coupled plasma mass spectrometry [19], graphite furnace atomic absorption spectrometry [20] and capillary electrophoresis [21]. The urine has a pH of 5.5-7.0 and a range of 6.2 [22], while the concentration of iron element in the urine is estimated to be about the median and range concentration of iron in urine was 4.9 ng mL -1 and < 2.1-16.4 ng mL -1 [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Cloud Point Extraction and Determination of Trace Iron(III) in Urine Samples by Spectrophotometry and Flame Atomic Absorption Spectrometry

Khudhair¹,

Hassan²

2017

Asian J. Chem.

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Cloud point technique used effectively for extraction and pre-concentration of iron(III) in the urine samples of occupational workers prior measured by using flame atomic absorption spectrometry and UV-visible spectrophotometer. The metal responds with benzidine as reagent in a non-ionic surfactant Triton X-114 medium. The main factors affecting cloud point extraction efficiencies, such as pH of sample solution, concentration of benzidine reagent, type of surfactant, concentration of Triton X-114, effect of salt out, influence of interferences and impact of equilibration temperature and time were studied. The calibration curve was linear in the range of 0.25-3.0 µg mL -1 with r 2 = 0.9655 for UV-visible spectrophotometer at λmax 425 nm. The limit of detection was 0.25 µg mL -1 . The relative standard deviation for six replicates was 3.071 %.

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“…During the ultrasonic and centrifugation process cloud point effect may occur, because both of the processes could increase the sample's temperature. [19][20][21][22] In this work, we developed a novel manual shaking and ultrasound-assisted surfactant-enhanced emulsification microextraction (M-UASEME) for the determination of eight organophosphorus pesticides (OPPs) in tap water and honey samples. Various parameters such as the kind and volume of the extraction solvent, the type and concentration of the surfactant, ultrasound time, salt addition and the extraction temperature were evaluated and optimized.…”

Section: Introductionmentioning

confidence: 99%

Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples

Xiong

Zhao

Yang

2017

J. Braz. Chem. Soc.

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A novel, rapid and efficient manual shaking and ultrasound-assisted surfactant-enhanced emulsification microextraction (M-UASEME) combined with gas chromatography-flame photometric detection (GC-FPD) was developed for the extraction and determination of eight organophosphorus pesticides (OPPs) in tap water and honey samples. The main parameters that affected the extraction efficiency were investigated and optimized. Under the optimum conditions, the relative standard deviation (RSD, n = 6) ranged from 2.4 to 9.3%. Limits of detection (LOD) were varied between 0.005 and 0.05 µg L for all analytes with the correlation coefficients (r) > 0.9964. Finally, the developed method was successfully applied to determine the eight pesticide residues in real samples. The recoveries of the target analytes in samples were between 82.4 and 96.7%.

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Cloud point extraction for speciation of iron in beer samples by spectrophotometry

Cited by 54 publications

References 29 publications

Simultaneous application of cloud point and solid-phase extraction for determination of Fe(III) and Cu(II) ions by using SnO2 nanopowder in micellar medium

Simultaneous application of cloud point and solid-phase extraction for determination of Fe(III) and Cu(II) ions by using SnO2 nanopowder in micellar medium

Cloud Point Extraction and Determination of Trace Iron(III) in Urine Samples by Spectrophotometry and Flame Atomic Absorption Spectrometry

Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples

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