Cloud point extraction combined with flame atomic absorption spectrometry for the determination of copper, iron and zinc using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol-tetraphenylborate ion-pairing agent

Xie, Meiyi; Liu, Wei-Ting; Hao, Xiaotang; Jiang, Xun; Zhong, Yizhou; Liu, Tiantian; Wang, Mei

doi:10.1007/s11696-021-01765-x

Cited by 7 publications

(2 citation statements)

References 40 publications

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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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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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“…Liquid-liquid micro-extraction [13,14], solidphase extraction [15,16], and chemical partitioning extraction [17][18][19][20][21][22][23][24][25][26] are the three most popular preconcentration techniques for finding Zn(II) in various materials right now. Because these processes can reduce or stop the usage or manufacture of harmful compounds, separation and preconcentration based on CPE have received a lot of attention recently.…”

Section: Introductionmentioning

confidence: 99%

Efficiency enhancement of the spectrophotometric determination of Zinc in water, food and pharmaceutical preparations samples using Cloud Point Extraction

et al. 2022

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To increase the analytical effectiveness of spectrophotometric detection of zinc (Zn (II)) in water, food, tobacco, and pharmaceutical preparations samples, cloud point extraction (CPE) and a new chromogenic reagent were used in this study. The proposed methodology is based on measuring the absorbance of a Zn(II) complex with 2-amino-4-(4-nitrophenyl) diazenyl) pyridine-3-ol (ANPDP) at pH 9.0 in Triton X-114 at maximum 595 and maximum 605 nm for methods without and with CPE. Investigation and optimization were done on the key variables determining CPE effectiveness. For techniques without CPE and with CPE, respectively, the calibration graph was linear under ideal conditions in the ranges of 10-140 µg mL -1 and 0.01-0.8 µg mL -1 , with R 2 = 0.9989 and 0.9997, respectively. For techniques without CPE and with CPE, the detection limits were 3.0 µg mL-1 and 0.003 µg mL -1 with a preconcentration factor of 50, respectively. As precision, the relative standard deviation (RSD %) is 4.0%. The interactions of various cations and anions have been studied. The proposed CPE method was successfully used to estimate Zn (II) in a variety of samples, including water, food, tobacco, and pharmaceutical preparations.

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A Dual‐Function Carbon Quantum Dot Fluorescent Probe for the Detection of Fe³⁺ and Sunset Yellow

Bao

Lan

et al. 2022

ChemistrySelect

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There are few researches on the application of multifunctional carbon quantum dots (CQDs) in analysis and detection. In this study, carbon quantum dots (CQDs) with dual‐function detection were synthesized by the one‐step hydrothermal method with citric acid as the carbon source and o‐phenylendiamine as the nitrogen source to detect Fe3+ and sunset yellow. The morphology of the prepared CQDs and the surface functional groups were characterized using TEM, FTIR, XPS, UV‐Vis spectroscopy, and fluorescence spectrophotometer. The results show that the morphology of CQDs is nearly spherical and well dispersed, with a particle size range of 1.24∼6 nm and the average particle size was 3.23 nm. The surface of the CQDs has hydrophilic groups, such as OH, −COOH and −NH2. CQDs exhibited good acid and alkali resistance, salt resistance, and photobleaching resistance under different conditions. The detection limits of CQDs for Fe3+ and sunset yellow were 1.52 μM and 0.812 μM, respectively. The recoveries of actual samples were 96.65 %∼104.85 % and 95.4 %∼104.55 %, with relative standard deviations (RSDs) of less than 6 %. Therefore, CQDs can be employed as dual‐function fluorescent probes in the practical detection of samples and have promising application prospects.

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Cloud point extraction combined with flame atomic absorption spectrometry for the determination of copper, iron and zinc using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol-tetraphenylborate ion-pairing agent

Cited by 7 publications

References 40 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

Efficiency enhancement of the spectrophotometric determination of Zinc in water, food and pharmaceutical preparations samples using Cloud Point Extraction

A Dual‐Function Carbon Quantum Dot Fluorescent Probe for the Detection of Fe³⁺ and Sunset Yellow

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Cloud point extraction combined with flame atomic absorption spectrometry for the determination of copper, iron and zinc using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol-tetraphenylborate ion-pairing agent

Cited by 7 publications

References 40 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

Efficiency enhancement of the spectrophotometric determination of Zinc in water, food and pharmaceutical preparations samples using Cloud Point Extraction

A Dual‐Function Carbon Quantum Dot Fluorescent Probe for the Detection of Fe3+ and Sunset Yellow

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A Dual‐Function Carbon Quantum Dot Fluorescent Probe for the Detection of Fe³⁺ and Sunset Yellow