Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 101, Issue 11, Pages 1567-1580Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2019.1686144
Keywords
Fruit juice; heavy metals; ligandless air assisted liquid-liquid microextraction; solidification; ternary deep eutectic solvent; water analysis
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A green, simple, rapid, and efficient ligandless air-assisted liquid-liquid microextraction method based on solidification of a ternary deep eutectic solvent was developed for the extraction of trace amounts of cadmium(II) and zinc(II) ions in aqueous samples. The method showed high detection sensitivity and accuracy for the determination of the target ions in water samples.
A green, simple, rapid, and efficient ligandless air-assisted liquid-liquid microextraction procedure based on solidification of a ternary deep eutectic solvent was developed for the extraction of trace amounts of cadmium(II) and zinc(II) ions in aqueous samples prior to their determination by flame atomic absorption spectrometry. For this purpose, the deep eutectic solvent is formed by mixing sorbitol, menthol, and mandelic acid at a suitable mole ratio and after heating for a short time, a deep eutectic solvent with low density compared to water is synthesised. The synthesised solvent is used as a chelating agent and also as an extraction solvent. Under the optimum experimental conditions, the linear ranges were obtained in the ranges of 0.5-12.5 and 0.5-10.0 mu g L-1 for Zn(II) and Cd(II), respectively. The relative standard deviations (n = 6, C = 2.5 mu g L-1 of each cation) were 4.2% and 3.4%, for Cd(II) and Zn(II), respectively. Moreover, the obtained detection limits were 0.15 and 0.12 mu g L-1 for Cd(II) and Zn(II), respectively. The accuracy of the developed method was studied by analysing SPS-WW2 Batch 108 water as a certified reference material. Finally, the proposed method was successfully applied in the determination of Cd(II) and Zn(II) ions in water and fruit juice samples.
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