Development of Dispersive Liquid‐Liquid Microextraction Based on Solidification of Floating Organic Drop for the Determination of Trace Cobalt in Water Samples

Zhang, Jingwen; Ke, Xiaojing; Wang, Yukun; Du, Xiaobo; Ma, Junying; Li, Jingci

doi:10.1002/jccs.201190144

Cited by 17 publications

(1 citation statement)

References 42 publications

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“…On the other hand, toxicities to humans from the intake of a large amount of cobalt are vasodilation, flushing and cardiomyopathy. 3,4 Thus, the development of analytical methods for trace cobalt determination is still required.…”

Section: Introductionmentioning

confidence: 99%

Vortex-assisted low density solvent and surfactant based dispersive liquid–liquid microextraction for sensitive spectrophotometric determination of cobalt

2018

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This study describes the development of vortex-assisted low density solvent and surfactant based dispersive liquid-liquid microextraction (VALS-DLLME) for Co(II) prior to its spectrophotometric detection. The method consisted of the complexation of Co(II) with pyrocatechol violet (PV) followed by the preconcentration of the Co(II)-PV complex using VALS-DLLME and then an absorption measurement at 600 nm. The optimum conditions for complex formation were a 1 : 3 mole ratio of Co(II) and PV at pH 7.5, while the conditions for VALS-DLLME were 300 mL 1-dodecanol as extraction solvent, and 300 mL acetonitrile as dispersive solvent under a vortex for 20 s with the addition of cationic surfactant (0.02 mmol L À1 CTAB). Under the optimum conditions, good linearity was in the range of 0.1-10 mg L À1 , the enrichment factor (EF) was 13.5 and the low limit of detection (LOD) was 0.04 mg L À1 . The method was applied to the analysis of Co(II) in water, green leaf vegetable and vitamin B 12 samples. The proposed method provided good recoveries in the range of 86-104%, which were comparable to those obtained from flame atomic absorption spectrophotometry. Results and discussionOptimization for the formation of Co(II)-PV complex Absorption spectra. The Co(II)-PV complex has blue color with the maximum absorption wavelength at 590 nm, while PV is yellow color with the maximum absorption wavelength at 7244 | RSC Adv., 2018, 8, 7243-7251 This journal is Fig. 1 (a) Absorption spectra of Co(II)-PV complex at different concentrations of Co(II) obtained from direct analysis (left) and with VALS-DLLME (right). Conditions of complexation: molar ratio (Co(II) : PV) of 1 : 3, phosphate buffer pH 7.5. Condition of VALS-DLLME: 300 mL 1-dodecanol, 0.02 mmol L À1 CTAB, 300 mL acetonitrile, 0.2 g Na 2 SO 4 , vortex at 3200 rpm for 40 s. (b) Effect of the PV concentration. Conditions: 1.00 mg L À1 Co(II) and phosphate buffer pH 7.5. (c) Effect of pH. Conditions: 1.00 mg L À1 Co(II) and 0.06 mmol L À1 PV in phosphate buffer.This journal is

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Section: Introductionmentioning

confidence: 99%

Vortex-assisted low density solvent and surfactant based dispersive liquid–liquid microextraction for sensitive spectrophotometric determination of cobalt

2018

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Recent overview of microextraction of metal ions and pharmaceuticals by solidified floating organic drop microextraction techniques

Kumar,

Satapathy,

Kurmi

et al. 2024

Separation Science Plus

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This work presents a comprehensive overview of solidified floating organic drop microextraction, with a particular emphasis on its applications in the analysis of heavy metal ions and different pharmaceutical compounds by sample pretreatment, complexation, and their identification by various analytical techniques. Here, we discussed basic principles, procedures, applications of the technique, and effects of different variables like pH, temperature, stirring rate, extraction time, salts addition, extraction solvent and extraction volume, centrifugation speed, and, vortex time on preconcentration. In brief, the review summarises the various modes of solidified floating organic drop microextraction such as dispersive liquid‐liquid microextraction, ultrasound‐assisted, air‐assisted liquid‐liquid microextraction, and vortex‐assisted solidified floating organic drop microextraction. this review covers the methods combined with analytical techniques such as inductively coupled plasma‐optical emission spectrometry, electrothermal atomic absorption spectrometry, flame atomic absorption spectroscopy, graphite furnace atomic absorption spectrometry, electrothermal vaporization inductively coupled plasma mass spectrometry, high‐performance liquid chromatography, and gas chromatography/mass spectrometry. among these, the incorporation of ultrasonic, vortex, and air agitation improves the dispersion mechanism. The coupling of solidified floating organic drop microextraction with other techniques enhances the selectivity and efficiency of the preconcentration procedure. This review provides a potential overview of the fundamental principles, advancements in various modes, influencing factors, and applications of solidified floating organic drop microextraction, showing its potential for advancements in sample preparation and analytical methodologies across various domains.

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Liquid-phase microextraction based on solidified floating drops of organic solvents

2013

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Development of Dispersive Liquid‐Liquid Microextraction Based on Solidification of Floating Organic Drop for the Determination of Trace Cobalt in Water Samples

Cited by 17 publications

References 42 publications

Vortex-assisted low density solvent and surfactant based dispersive liquid–liquid microextraction for sensitive spectrophotometric determination of cobalt

Vortex-assisted low density solvent and surfactant based dispersive liquid–liquid microextraction for sensitive spectrophotometric determination of cobalt

Recent overview of microextraction of metal ions and pharmaceuticals by solidified floating organic drop microextraction techniques

Liquid-phase microextraction based on solidified floating drops of organic solvents

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