Development of new efficient and cost effective liquid-liquid extractive determination method for cobalt(II): Analysis of water, alloys and nano powder

Sadlapurkar, Ashwini V.; Barache, Umesh B.; Shaikh, Abdul Basit; Lawand, A. S.; Gaikwad, Shashikant H.; Lokhande, Tukaram N.

doi:10.1016/j.jtemin.2022.100026

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…Nevertheless, flame atomic absorption spectroscopy (FAAS) is the most popular method, and it is employed for the determination of water Co content in soil and food [14]. In addition, FAAS was selected as a reference technique for the validation of Co quantification with UV-vis spectrophotometer [15]. Another atomic absorption spectroscopy method, Flameless atomization, has been utilized for Co quantification with detection limits comparable to plasma techniques, but these instruments are relatively expensive, and their operation and maintenance costs are also substantial [16].…”

Section: ■ Introductionmentioning

confidence: 99%

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Mehdi,

Alshamkhawy

2024

Indones. J. Chem.

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A procedure based on dispersive liquid-liquid microextraction (DLLME) for cobalt (Co) quantification in an Iraqi environmental matrix by flame atomic absorption spectroscopy (FAAS) was applied in this work. A case-study approach was chosen to obtain further in-depth information on the Co levels and to evaluate the effectiveness of N-salicylideneaniline (SAN) as a complexing agent for pre-concentration and extraction of Co. An univariate strategy was utilized to achieve the optimum extraction conditions. The estimated limits of detection (LOD) and quantification (LOQ) under optimum conditions were 1.04 and 3.47 µg L−1, respectively. The results achieved by the proposed system were compared with those using the microwave digestion/graphite furnace atomic absorption spectrometer (MWD/GF-AAS) for digest samples and also for some water samples (Direct GF-AAS). The proposed procedure was applied for analyzing eleven environmental samples. The detectable Co levels for water samples ranged from 0.72 to 4.30 µg L−1 with a relative standard deviation of 3.7–8.8%, while the concentration for solid samples ranged from 0.17–4.51 µg g−1 (2.4–11.8 RSD %). DLLME/FAAS proposed procedure is effective, simple, and has the benefit of minimizing the organic solvent consumption by a few microliters, which results in little waste.

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Section: ■ Introductionmentioning

confidence: 99%

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Mehdi,

Alshamkhawy

2024

Indones. J. Chem.

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Spectrophotometric determination of cobalt ions in water using bimetallic chemosensor based on sulfa drug azo dye

Nassar,

Mohammed

2024

J.Umm Al-Qura Univ. Appll. Sci.

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A spectrophotometric technique has been developed for detection of cobalt(II) ions in aqueous solution samples utilising a new chemosensor. This technique relies on the formation of a stable yellow-orange complex at pH = 13 using 4-(2-Hydroxy-naphthalen-1-ylazo)-N-thiazol-2-yl-benzenesulfonamide (H2L) as ligand through complexation with Co(II) ions. At λ = 390 nm, complex absorption was detected. A correlation coefficient of 0.9934 indicated linearity in the concentration range of (1.7–8.4 × 10–5 mol L−1). The limit of detection (LOD) and limit of quantification (LOQ) were assigned to be 0.147 µg ml−1 (2.5 µmol L−1) and 0.489 µg ml−1 (8.3 µmol L−1),respectively. The stoichiometric composition of the complex, which is 2:1 of M:L, was confirmed by the correlation between the continuous variation results and the molar-ratio methods proposed by Job. Additionally, the structure of the solid complex that is produced when H2L reacts with Co(NO3)2.6H2O has been determined by applying different spectroscopic and analytical techniques, confirming the formation of the complex in the same molar ratio as that determined by Job’s method. The geometrical structure of the complex was confirmed to be tetrahedral by a combination of magnetic moment results and UV-Vis spectra.

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Development of a high-performance optical sensor for sensitive detection of cobalt ions in pharmaceutical, food, biological, and environmental samples

Hassan,

El-Bahy,

Babalghith

et al. 2025

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Development of new efficient and cost effective liquid-liquid extractive determination method for cobalt(II): Analysis of water, alloys and nano powder

Cited by 5 publications

References 37 publications

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Spectrophotometric determination of cobalt ions in water using bimetallic chemosensor based on sulfa drug azo dye

Development of a high-performance optical sensor for sensitive detection of cobalt ions in pharmaceutical, food, biological, and environmental samples

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