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Spectrophotometric Determination of Cobalt(II) by Natural Deep Eutectic Solvent (NADES) Air-Assisted Dispersive Liquid-Liquid Microextraction (AA-DLLME)

Authors :
Akhtar, Farhan
Khan, Mansoor
Khan, Naeem
Khan, Saeed Ahmad
Sun, Wei
Ullah, Riaz
A. Ibrahim, Mohamed
Nishan, Umar
Badshah, Amir
Jamila, Nargis
Kim, Kyng Su
Source :
Analytical Letters. Sep2024, p1-13. 13p. 8 Illustrations.
Publication Year :
2024

Abstract

AbstractCobalt is beneficial for human activity but has adverse effects when discharged in large quantities. Therefore, its precise and accurate quantification in samples is of importance. Here, a natural deep eutectic solvent (NADES), composed of camphor (H-bond acceptor) and menthol (H-bond donor), has been used for the preconcentration of Co(II) from water samples before determination by a spectrophotometer at 398 nm. The 8-hydroxyquinoline-Co(II) complex was transferred to the NADES using air-assisted dispersive liquid-liquid microextraction (AA-DLLME). The extraction efficiency was enhanced through fine tuning of various parameters, including pH, NADES volume, and quantity of dispersant. Similarly, the centrifugation rate and time, quantity of the complexing agent, matrix effects, and salt concentration were also evaluated. Under the optimized conditions, an enrichment factor of 37.5 and a preconcentration factor of 37.5 were obtained. The limits of detection (LOD) and quantification (LOQ) were 0.44 µg/L and 1.47 µg/L, respectively. For seven replicates of 50 µg/L Co(II), the relative standard deviation was 3.2%. The developed method was employed for the determination of Co(II) in water samples, with quantitative recovery values from 94.5 to 98.5%. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00032719
Database :
Academic Search Index
Journal :
Analytical Letters
Publication Type :
Academic Journal
Accession number :
179731187
Full Text :
https://doi.org/10.1080/00032719.2024.2405871