Determination of trace levels of cobalt ion in different real samples using dispersive liquid–liquid microextraction followed by flame atomic absorption spectrometry

Beikzadeh, Elham; Sarrafi, Amir

doi:10.1007/s11694-017-9474-9

Cited by 12 publications

(2 citation statements)

References 12 publications

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“…In addition, the initial charge distribution of amphiphilic molecules is disrupted, hence preventing the formation of coacervate. There are similarities between the results expressed in this proposed work and those described with that of [33] and also consistent with the literature [34][35] conducted without ionic salt.…”

Section: Influences Of Salting Additionsupporting

confidence: 92%

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: Influences Of Salting Additionsupporting

confidence: 92%

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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“…Due to its nutritional and toxicological importance, cobalt is necessary to assay in real samples, such as pharmaceutics, food products, biological fluids, and natural waters (22)(23)(24). Several instrumental techniques have been developed to determine the trace amounts of cobalt, such as flame atomic absorption spectrometry (25)(26)(27)(28)(29)(30), inductively coupled plasma mass spectrometry (31), inductively coupled plasma optical emission spectrometry (32), highperformance liquid chromatography (33), and graphite furnace atomic absorption spectrometry (34)(35)(36). However, these techniques are sophisticated and expensive.…”

Section: Introductionmentioning

confidence: 99%

Surface-Active Ionic Liquid-Assisted Cloud Point Extraction for Pre-Concentration and Determination of Cobalt Ions in Pharmaceutical Preparations

Bamdad

Habibi

2022

Iran J Pharm Res

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: Herein we describe an efficient, simple, and precise micelle-mediated microextraction strategy based on the aggregation behavior of surface-active ionic liquids (SAILs) for the preconcentration and determination of cobalt ions in pharmaceutical preparations. Unlike the commonly used hydrophobic ionic liquids in IL-based microextraction methods, a water-soluble surface-active ionic liquid [1-hexadecyl 3-methylimidazolium chloride (C16MeImCl)] was used. A modified cloud point extraction (CPE) procedure based on the C16MeImCl-Triton X-114 mixed micellar system was proposed as an efficient extracting phase. A comparison of the analytical features of the extraction process with and without SAILs revealed the benefits of the proposed method. Advantages such as a wider linear range, lower detection limit, higher reproducibility, and improved extraction efficiency highlighted the proposed method over the conventional CPE method. These attractive specifications are due to the higher extraction efficiencies achieved in the presence of the SAIL and its favorable effects at the phase separation stage. Various parameters affecting the extraction efficiency were optimized by univariate and multivariate (Box-Behnken design) approaches. The calibration curve was obtained in the optimal experimental conditions with a linear range from 0.01 to 5.5 mg L-1 of cobalt ion concentration (R = 0.9992) and a detection limit of about 0.005 mg L-1. The RSD% for 10 replicate determinations of 1.0 mg L-1 Co was 0.9%. The proposed method was successfully applied to determine cobalt ions in vitamin B12 ampoules and tablets.

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A New Simple and Fast Method for Determination of Cobalt in Vitamin B12 and Water Samples Using Dispersive Liquid-Liquid Microextraction and Digital Image Analysis

Lemos

Souza

Santos

et al. 2020

Water Air Soil Pollut

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Determination of trace levels of cobalt ion in different real samples using dispersive liquid–liquid microextraction followed by flame atomic absorption spectrometry

Cited by 12 publications

References 12 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

Surface-Active Ionic Liquid-Assisted Cloud Point Extraction for Pre-Concentration and Determination of Cobalt Ions in Pharmaceutical Preparations

A New Simple and Fast Method for Determination of Cobalt in Vitamin B12 and Water Samples Using Dispersive Liquid-Liquid Microextraction and Digital Image Analysis

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