Multivariate optimization of dispersive liquid-liquid microextraction using ionic liquid for the analysis of ultraviolet filters in natural waters

In this work, a vortex-assisted dispersive liquid-liquid microextraction method, using an ionic liquid as the extracting solvent was developed, for the simultaneous analysis of three UV filters in different water samples. The extracting and dispersive solvents were selected in a univariate way. Then...

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Veröffentlicht in:Talanta (Oxford) 2023-07, Vol.259, p.124469-124469, Article 124469
Hauptverfasser: Pestana, Yan M.R., Sousa, Érika M.L., Lima, Diana L.D., Silva, Lanna K., Pinheiro, Jeiza F., Sousa, Eliane R., Freitas, Arlan S., Rangel, José H.G., Silva, Gilmar S.
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container_title Talanta (Oxford)
container_volume 259
creator Pestana, Yan M.R.
Sousa, Érika M.L.
Lima, Diana L.D.
Silva, Lanna K.
Pinheiro, Jeiza F.
Sousa, Eliane R.
Freitas, Arlan S.
Rangel, José H.G.
Silva, Gilmar S.
description In this work, a vortex-assisted dispersive liquid-liquid microextraction method, using an ionic liquid as the extracting solvent was developed, for the simultaneous analysis of three UV filters in different water samples. The extracting and dispersive solvents were selected in a univariate way. Then, the parameters such as the volume of the extracting and dispersive solvents, pH and ionic strength were evaluated using a full experimental design 24, followed by Doehlert matrix. The optimized method consisted of 50 μL of extracting solvent (1-octyl-3-methylimidazolium hexafluorophosphate), 700 μL of dispersive solvent (acetonitrile) and pH of 4.5. When combined with high-performance liquid chromatography, the method limit of detection ranged from 0.3 to 0.6 μg L−1, enrichment factors between 81 and 101%, and the relative standard deviation between 5.8 and 10.0%. The developed method demonstrated effectiveness in concentrating UV filters in both river and seawater samples, being a simple and efficient option for this type of analysis. [Display omitted] •The optimization of microextraction of UV-filters using DLLME was achieved through factorial designs.•The recovery values obtained in real samples were satisfactory (81–120%).•The optimized method provided limits of detection between 0.3 and 0.6 μg L−1.•The developed methodology was applied for the analysis of UV-filters in fresh and seawater samples.
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subjects acetonitrile
detection limit
Doehlert matrix
Friendly solvents
Full factorial experimental design
high performance liquid chromatography
ionic liquids
ionic strength
liquid-phase microextraction
Microextraction
rivers
seawater
standard deviation
Water samples
title Multivariate optimization of dispersive liquid-liquid microextraction using ionic liquid for the analysis of ultraviolet filters in natural waters
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