Microextraction of metal ions based on solidification of a floating drop: Basics and recent updates

Mortada, Wael I.; Azooz, Ebaa Adnan

doi:10.1016/j.teac.2022.e00163

Cited by 30 publications

(7 citation statements)

References 93 publications

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“…The residue was cooled, then processed with 10.0 mL concentrated HNO 3 and 3 mL 30% H 2 O 2 before being maintained in a furnace for 3 hours at the same temperature to ensure that no traces of organic compounds are remained. The final residue was treated with 5 mL of concentrated HCl and 3 mL of 70% HClO 4 before being heated to evaporate the fumes and convert all of the metals to their proper ions [42]. In addition, blank digestions were carried out.…”

Section: Food Samples Preparationmentioning

confidence: 99%

“…The results show that 0.5mL Triton X -114 was the optimum volume for higher extraction efficiency for both metal ions, and that this volume is suitable for reaching critical micelles concentration (CMC) state, in order to form the best CPL suitable for excellent extraction. Any volume less or more than the optimum value is not suitable for reaching CMC state, and thus gives lower extraction efficiency [42]. phase, and the process was completed, providing the results shown in Figures 6 and 7.…”

Section: Surfactant Volume Effectmentioning

confidence: 99%

“…When it comes to CPL production and extraction, this temperature achieves the strongest thermodynamic equilibrium [43]. After measuring the extraction content K ex at each temperature, Figure 8 was created by plotting the logarithm value K ex versus 1/T K. As shown in Table 3, which was utilized to calculate the thermodynamic date for each metal ion [42]. The optimum heating period for excellent extraction efficiency of both metal ions was 20 minutes.…”

Section: Surfactant Volume Effectmentioning

confidence: 99%

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Separation and Micro Determination of Zinc(II) and Cadmium(II) in Food Samples Using Cloud Point Extraction method

Wannas

Azooz

Ridha

et al. 2023

Iraqi Journal of Science

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The cloud point extraction technique has become increasingly popular in recent years for trace metal separation and preconcentration. When heated to a specific temperature, cloud point extraction utilizes the property of nonionic surfactants in aqueous solutions to generate micelles and become turbid (so-called cloud point temperature). For analytical chemists, developing a simple and selective technology for the separation and determination of metals and medicinal drugs is a critical concern. Therefore, a sensitive, accurate, and green cloud point extraction (CPE) procedure was developed for the micro-determination of metal cations like zinc (II) and cadmium (II) in food samples. Triton X–114 and 1-(4-(Phenyldiazenyl) phenyl) azo naphthalene-2-ol (Sudan III) were used as extractants. Sudan III forms an ion-pair association complex with metal ions when the pH is 9. In the presence of 5 ppm zinc (II) or 4 ppm cadmium (II) in an aqueous solution, the maximum extraction efficiency should be achieved. In order to create Cloud Point Temperature (CPT) quantitatively, the extraction applications in this approach required heating at 85°C for 20 minutes. In this work, the impacts of different surfactants, pH, stoichiometry, and various organic reagents on interferences as well as spectrophotometric determination were explored. The linearity ranges of zinc (II) and cadmium (II) were 0.25-700 and 0.25-400 ppm, respectively. The results show low detection limits of 0.035 and 0.042 ppm for zinc (II) and cadmium (II), respectively. Also, the quantification limits for zinc (II) and cadmium (II) are 0.116 and 0.140 ppm, respectively.

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Section: Food Samples Preparationmentioning

confidence: 99%

Section: Surfactant Volume Effectmentioning

confidence: 99%

Section: Surfactant Volume Effectmentioning

confidence: 99%

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Separation and Micro Determination of Zinc(II) and Cadmium(II) in Food Samples Using Cloud Point Extraction method

Wannas

Azooz

Ridha

et al. 2023

Iraqi Journal of Science

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“…Cloud point extraction (CPE) is a modified LLE approach that uses micelles as an extraction solvent instead of hazardous organic solvents [10][11][12][13]. Among the preconcentration procedures, CPE represents a simple and environmentally friendly procedure for separation of inorganic and organic species in different samples [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Displacement cloud point extraction procedure for preconcentration of iron(III) in water and fruit samples prior to spectrophotometric determination

Azooz¹,

Shabaa²,

Al-Muhanna³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. For the enrichment of iron(III) prior to spectrophotometric determination, displacement cloud point extraction (D-CPE) technique was applied depending on the difference in stability constant of metal complexes. Zinc(II) as gallic acid complex was first separated into a Triton X-100 surfactant. Then, once the aqueous phase has been removed, the sample containing Fe(III) is added, and another CPE process is performed. Because Fe-GA has a higher stability than Zn-GA, Fe(III) can displace Zn(II) from the pre-extracted Zn-GA, allowing for Fe(III) separation from the complex sample matrix and its spontaneous spectrophotometric determination at 560 nm. The effects of pH, ligand, and surfactant quantities, temperature and heating time, centrifuge processes, and interferences were all studied. At the optimal conditions, the calibration graph was linear from 0.5 to 500 µg L-1 with enrichment factor of 75.0. The LOD was 0.15 µg L-1 and the RSD was 1.3% for 60 µg L-1 of Fe(III), n = 10. Accuracy was also evaluated using the standard reference substance (SRS) and flame atomic absorption spectroscopy (FAAS) approaches. This procedure was used for separation and micro-determination of Fe(III) in water and fruit tests (banana, strawberry, lemon, orange, and peaches) with recoveries ranged from 96.5 to 105%. KEY WORDS: Displacement cloud point extraction, Iron, Spectrophotometry, Fruit samples Bull. Chem. Soc. Ethiop. 2023, 37(1), 1-10. DOI: https://dx.doi.org/10.4314/bcse.v37i1.1

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“…These methods can be classified into two main categories: solid phase microextraction (SPME) and liquid phase microextraction (LPME). Dispersive liquid-liquid microextraction (DLLME), Solidifiedfloating organic drop microextraction (SFODME), switchable solvent based microextraction (SS-LPME) can be given as examples for the liquid phase microextraction method [12][13][14]. These methods are environmentally friendly, low-cost, high-yield, time-saving, low-risk, reliable, and friendly to living and non-living environments with simpler steps and less harmful or harmless substances.…”

mentioning

confidence: 99%

An environmentally friendly microextraction method for the determination of cadmium in water samples

AYDIN URUCU

2023

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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An environmentally friendly switchable solvent based microextraction method was developed for cadmium ions prior to determination by FAAS. N, N-dimethyl-n-octylamin and 1-(2-Pyridylazo)-2-naphthol were used as switchable solvent and ligands, respectively. Important method parameters such as pH, amount of extraction solvent and ligand, volume of sample and NaOH and foreign ions effects have been optimized. Limits of detection and quantification, preconcentration factor were determined as 0.063 mg L-1, 0.21 mg L-1 and 60, respectively. The validation study of the developed method was carried out by spiking a fixed amount of cadmium to the water samples and determining the recovery. The method was used to determine the cadmium ions content of various environmental water samples.

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Microextraction of metal ions based on solidification of a floating drop: Basics and recent updates

Cited by 30 publications

References 93 publications

Separation and Micro Determination of Zinc(II) and Cadmium(II) in Food Samples Using Cloud Point Extraction method

Separation and Micro Determination of Zinc(II) and Cadmium(II) in Food Samples Using Cloud Point Extraction method

Displacement cloud point extraction procedure for preconcentration of iron(III) in water and fruit samples prior to spectrophotometric determination

An environmentally friendly microextraction method for the determination of cadmium in water samples

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