Developed cloud point extraction coupled with onium system for separation and determination cobalt in Biological samples

Azooz, Ebaa Adnan; Wannas, Fatimah A.; Jawad, Shawket Kadhem

doi:10.5958/0974-360x.2021.00106.2

Cited by 18 publications

(7 citation statements)

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“…The reagent is commercially available and does not need to be synthesized. It is not necessary to add electrolyte to increase the extraction efficiency [ 36 , 37 , 40 , 41 ] or organic solvent to provide synergistic extraction [ 33 ] or to reduce the viscosity of the SRP [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

“…It can be easily combined with various sample preparation techniques to improve analytical characteristics and extend the scope of application. The list of such techniques comprises liquid–liquid extraction [ 27 ], dispersive liquid–liquid microextraction [ 28 ], continuous sample drop flow-based microextraction [ 29 ], deep eutectic solvent microextraction [ 30 ], and cloud point extraction (CPE) [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

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Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt

et al. 2022

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The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) complex, [CoIII(HL−)(L2−)]0, shows an absorption maximum at 553 nm and contains HTAR in two different acid–base forms. Optimum conditions for its formation and CL-CPE were found as follows: 1 × 10−5 mol L−1 of HTAR, 1.64% of Triton X-114, pH of 7.8, incubation time of 20 min at ca. 50 °C, and cooling time of 30 min at ca. −20 °C. The linear range, limit of detection, and apparent molar absorptivity coefficient were 5.4–189 ng mL−1, 1.64 ng mL−1, and 2.63 × 105 L mol−1 cm−1, respectively. The developed procedure does not use any organic solvents and can be described as simple, cheap, sensitive, convenient, and environmentally friendly. It was successfully applied to the analysis of artificial mixtures and real samples, such as steel, dental alloy, rainwater, ampoules of vitamin B12, and saline solution for intravenous infusion.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt

et al. 2022

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“…The solution in CPE is divided into two layers: an aqueous layer (AL) and a cloud point layer (CPL), which is rich in surfactants and typically contains analytes. The type and concentration of surfactant used to form CPL are two critical reagents in separation [24][25][26][27][28][29]. In CPE, the analytes must be hydrophobic or be converted into hydrophobic molecules for surfactant coupling.…”

Section: Introductionmentioning

confidence: 99%

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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“…However, they lack sufficient selectivity and sensitivity for the measurement of metal ions in the complicated matrices. This problem could be solved by utilizing a preconcentration step to separate the analyte prior to the determination [4,5]. The most common preconcentration processes are solid-phase extraction (SPE) [6] and liquidliquid extraction (LLE) [7].…”

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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Developed cloud point extraction coupled with onium system for separation and determination cobalt in Biological samples

Cited by 18 publications

References 0 publications

Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt

Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt

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

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