Selective determination of metal chlorocomplexes in saline waters by magnetic ionic liquid–based dispersive liquid–liquid microextraction Selective determination of metal chlorocomplexes in saline waters by magnetic ionic liquid–based dispersive liquid–liquid microextraction

In this work, we explore a new dispersive liquid–liquid microextraction (DLLME) method to selectively separate chemical species of Cd and Zn in saline waters. It is based on the use of the magnetic ionic liquid (MIL) methyltrioctylammonium tetrachloroferrate ([N 1,8,8,8 + ][FeCl 4 − ]), which allows...

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Vydáno v:Analytical and bioanalytical chemistry Ročník 417; číslo 7; s. 1369 - 1379
Hlavní autoři: Herce-Sesa, Belén, López-López, José A., Moreno, Carlos
Médium: Journal Article
Jazyk:angličtina
Vydáno: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2025
Springer Nature B.V
Témata:
Analytical Chemistry
Biochemistry
Cadmium
Cations
Centrifugation
Characterization and Evaluation of Materials
Chemical analysis
Chemical speciation
chemical species
Chemistry
Chemistry and Materials Science
Chloride
Energy consumption
Food Science
Heavy metals
Ionic liquids
Laboratory Medicine
Liquid phases
liquid-phase microextraction
liquids
magnetic materials
magnetism
Metal concentrations
Metals
Methods
Monitoring/Environmental Analysis
Nitric acid
Reagents
reference standards
Research Paper
Seawater
Separation
Species
Sustainability in Sample Preparation
Toxicity
Viscosity
Water analysis
Zinc
Zinc chloride
Magnetic ionic liquids
Metal speciation
Dispersive liquid–liquid microextraction
Seawater
ISSN:1618-2642, 1618-2650, 1618-2650
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Shrnutí:In this work, we explore a new dispersive liquid–liquid microextraction (DLLME) method to selectively separate chemical species of Cd and Zn in saline waters. It is based on the use of the magnetic ionic liquid (MIL) methyltrioctylammonium tetrachloroferrate ([N 1,8,8,8 + ][FeCl 4 − ]), which allows an efficient and environmentally friendly extraction of the target species. In addition, the paramagnetic component in the MIL simplifies the separation step required in DLLME, allowing for fast separation and recovery of the extracted species with a magnet, without a centrifugation step. The optimum conditions for the separation by MIL-DLLME were 3.3 mg mL −1 MIL, sample pH = 8, and an extraction time of 30 min. Under these conditions, metal chlorocomplexes (99.7% and 81.0% of total metal concentration for Cd and Zn, respectively) were quantitatively separated, remaining the free cations in the aqueous samples. In a second step, the extracted metal species were back-extracted with 1 mol L −1 HNO 3 and a re-extraction time of 15 min. For cadmium, this acidic solution separated the neutral complex CdCl 2 (60.5%), while CdCl + (21.5%) and CdCl 3 − (18.1%) remained in the organic phase. For Zn, the anionic complex ZnCl 3 − (17.3%) was retained by the organic reagent, while ZnCl 2 (45.7%) and ZnCl + (37.0%) were re-extracted by the nitric acid solution. The separation of the chemical species of metals along the three liquid phases used allowed their quantification in several samples of real seawater and a certified reference material. Graphical Abstract
Bibliografie:ObjectType-Article-1
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ISSN:1618-2642
1618-2650
1618-2650
DOI:10.1007/s00216-024-05655-5