Methodology for Preconcentration and Determination of Silver in Aqueous Samples using Cloud Point Extraction

Azooz, Ebaa Adnan; Shabaa, Ghusoon Jawad; Al-Mulla, Emad A. Jaffar

doi:10.30744/brjac.2179-3425.ar-61-2021

Cited by 13 publications

(8 citation statements)

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“…T=60 °C was reported to be the optimum temperature for maximum extraction efficiency for both ions examined, according to the findings. 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].…”

Section: Surfactant Volume Effectmentioning

confidence: 99%

“…After constructing a calibration curve of the metals, Zn (II) and Cd (II) metal ions were determined extensively under optimal conditions [43]. Table 3 also lists the analytical parameters that were measured.…”

Section: Food Samples Determinationmentioning

confidence: 99%

“…A variety of methods have been used for this purpose, including liquid-ion exchange (LIE) [9,10], solvent extraction (SE) [11], flame atomic absorption spectroscopy (FAAS) [12], spectrophotometric study [13], liquid chromatography [14], kinetic spectrophotometry [15], and cloud point extraction (CPE) [16]. However, The CPE is a sensitive preconcentration and isolation procedure for abundant analytes with several advantages over traditional solvent extraction [17][18][19].…”

Section: Introductionmentioning

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: Surfactant Volume Effectmentioning

confidence: 99%

Section: Food Samples Determinationmentioning

confidence: 99%

Section: Introductionmentioning

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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“…A number of approaches have been performed to detect AA levels, including spectrofluorimetry, UV spectroscopy, and electrophoresis. However, these need to be more practical and require re-evaluation owing to inadequate accuracy and precision . The application of the colorimetric method reported by a study showed a better accuracy, where the results were in close agreement with a confidence level of 95% against the iodometric technique. , Several studies have reported that the most preferred technique for determining AA levels in fruits and vegetables is a spectrophotometry approach using Fourier transform infrared (FTIR) spectroscopy owing to the rapidity, selectivity, sensitivity, reliability, and consistency …”

Section: Introductionmentioning

confidence: 99%

Environment-Friendly Approach to Isolate Ascorbic Acid from Plants and Micro-identified Using Fourier Transform Infrared Spectroscopy

Munir,

Jamal,

Inayatullah

2024

ACS Food Sci. Technol.

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Vitamin C [ascorbic acid (AA)] is an imperative antioxidant that humans require. Fruits and vegetables commonly contain AA. The application of titrimetric or chromatographic methods is generally performed to analyze AA; nevertheless, these approaches have several disadvantages such as being very costly for chromatographic methods and exhibiting food color interference upon using titration techniques. This study cruises the application of microwave treatment on AA compounds of plant samples and identified the AA level using Fourier transform infrared (FTIR) spectroscopy. The purposes of this study were to establish a validated method for the microwave-assisted isolation (MAI) of AA from plant samples. Validation studies such as linearity, selectivity, sensitivity, detection, and quantitation limits were evaluated using a standard AA solution. These methods were also applied for AA quantitation in oranges, guava, and spinach. The methods were selective and sensitive when applied to the standard solution. The FTIR spectroscopy approach was more sensitive, with lower values for detection limit (13.76 nmol•L −1 ) and quantitation limit (41.69 nmol•L −1 ), and more accurate with an error of less than 1%. The imperative AA groups are also identified, such as the hydroxyl groups found at 3297 nm −1 . In contrast, the aromatic group of AA can be obtained at 2084 cm −1 , although the absorption intensity is weak. The 1635 cm −1 atom is related to the carbonyl group (−C�O). The validated method was applied to investigate the AA level in plant samples, and all of them showed identical peaks with the standard, showing that the MAI has isolated the AA completely.

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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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Methodology for Preconcentration and Determination of Silver in Aqueous Samples using Cloud Point Extraction

Cited by 13 publications

References 1 publication

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

Environment-Friendly Approach to Isolate Ascorbic Acid from Plants and Micro-identified Using Fourier Transform Infrared Spectroscopy

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

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