Ultrasound-assisted hollow fiber/ionic liquid-based liquid phase microextraction using an ionic liquid solvent for preconcentration of cobalt and nickel ions in urine samples prior to FAAS determination

Hsu, Keng-Chang; Lee, Cheng-Fa; Chao, Yu-Ying; Hung, Chih-Chang; Chen, Po-Chih; Chiang, Chien-Hua; Huang, Yeou‐Lih

doi:10.1039/c6ja00183a

Cited by 23 publications

(4 citation statements)

References 47 publications

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“…In addition, the efficiency of the method was evaluated by comparing the results achieved with other similar methods reported in the literature (Table ) …”

Section: Resultsmentioning

confidence: 99%

“…In addition, the efficiency of the method was evaluated by comparing the results achieved with other similar methods reported in the literature ( Table 2). [41][42][43][44][45][46] Real sample analysis To validate the applicability of the method in preconcentration of Co(II) in real samples, it was applied to water and nut samples. Table 3 shows the real sample analysis and indicates that the recoveries ranged from 94.6% to 109.8%, and the RSD value was between 2.3% and 3.1%.…”

Section: Analytical Performancementioning

confidence: 99%

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Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

et al. 2020

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BACKGROUND Heavy metal contamination in water and agricultural products is a major concern that causes risks for human health. This article describes a highly selective approach to preconcentrate cobalt(II) (Co(II)) ions based on the standard UV–visible measurement of Co(II)–1‐(2‐pyridylazo)‐2‐naphthol complex at λ = 628 nm in water and nut samples. In this method, magnetic silica (mSiO2) was utilized as a practical sorbent and 1‐(2‐pyridylazo)‐2‐naphthol was employed as a complexing agent in the elution step. The adsorbent was characterized via X‐ray diffraction spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. The effects of the main variables (pH, adsorption time, sorbent amount, pH of eluent, ligand volume, and desorption time) were investigated and established. RESULTS The maximum recovery was achieved at pH 7 ± 0.3, adsorption time of 60 min, sorbent amount of 40 mg, eluent pH 8 ± 0.2, ligand volume of 2 mL (16.95 × 10−4 mol L−1) and desorption time of 30 min. The linearity of dynamic range (10–500 μg L−1), limit of detection (0.32 μg L−1), relative standard deviation (3.04%), and preconcentration factor (25) show the reliability of the method. The sorbent was reusable 12 times. Selectivity and the effect of interference ions were successfully examined. The adsorption process of Co(II) ions on mSiO2 was investigated based on Langmuir and Freundlich isotherms. The Freundlich model was fitted with the system and the maximum capacity adsorption of mSiO2 for Co(II) adsorption is 2.35 mg g−1. Then, the kinetics study revealed that the adsorption process of Co(II) ions on the mSiO2 follows the pseudo‐first‐order model. The thermodynamics parameters ΔG, ΔS, and ΔH were calculated. CONCLUSION The method was fruitfully applied to preconcentrate Co(II) ions in water and nut samples. This method offers high selectivity and precision for determining Co(II) ions. © 2020 Society of Chemical Industry

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“…In addition, the efficiency of the method was evaluated by comparing the results achieved with other similar methods reported in the literature (Table ) …”

Section: Resultsmentioning

confidence: 99%

Section: Analytical Performancementioning

confidence: 99%

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

et al. 2020

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“…Hollow fiber LPME and some of its modifications such as ion pair HF-LPME have been used in OBM for the determination of lead (Salari et al, 2018), nickel and cobalt (Hsu et al, 2016), muconic acid, MA, hippuric acid and methyl hippuric acid (Bahrami et al, 2017(Bahrami et al, , 2018Ghamari et al, 2016Ghamari et al, , 2017 and pyrethroid pesticides (Lin et al, 2011). For instance, an ion paire HF-LPME (IP-HF-LPME) has been developed to extract urinary muconic acid, hippuric acid and MA followed by HPLC-UV analysis.…”

Section: Hollow Fiber Liquid Phase Microextractionmentioning

confidence: 99%

Microextraction techniques for occupational biological monitoring: Basic principles, current applications and future perspectives

Sohrabi,

Rahimian,

Yousefinejad

et al. 2024

Biomedical Chromatography

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The application of green microextraction techniques (METs) is constantly being developed in different areas including pharmaceutical, forensic, food and environmental analysis. However, they are less used in biological monitoring of workers in occupational settings. Developing valid extraction methods and analytical techniques for the determination of occupational indicators plays a critical role in the management of workers’ exposure to chemicals in workplaces. Microextraction techniques have become increasingly important because they are inexpensive, robust and environmentally friendly. This study aimed to provide a comprehensive review and interpret the applications of METs and novel sorbents and liquids in biological monitoring. Future perspectives and occupational indicators that METs have not yet been developed for are also discussed.

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“…The two phase HF-LPME system is comprised of an acceptor phase located within the lumen of a porous fiber and the donor phase (i.e., the sample). This microextraction mode has been applied toward the extraction of Co 2+ and Ni 2+ from human urine samples . The chelating agent 1-(2-pyridylazo)-2-naphthol (PAN) was added to the sample solution to aid in the partitioning of Co 2+ and Ni 2+ to the hydrophobic [C 6 MIM + ][PF 6 – ] IL phase.…”

Section: Sample Preparationmentioning

confidence: 99%

Advances of Ionic Liquids in Analytical Chemistry

et al. 2018

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Ultrasound-assisted hollow fiber/ionic liquid-based liquid phase microextraction using an ionic liquid solvent for preconcentration of cobalt and nickel ions in urine samples prior to FAAS determination

Abstract: Ultrasound-assisted hollow fiber liquid-phase microextraction coupled with FAAS has been developed to preconcentrate and determine ultra-trace amounts of Co and Ni ions in human urine.

Cited by 23 publications

References 47 publications

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

Microextraction techniques for occupational biological monitoring: Basic principles, current applications and future perspectives

Advances of Ionic Liquids in Analytical Chemistry

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