期刊
FOOD CHEMISTRY
卷 245, 期 -, 页码 586-594出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.10.134
关键词
Aluminum; Chromium; Microextraction; Ionic liquid; Vegetables; Flame atomic absorption spectrometry
资金
- Cumhuriyet University Scientific Research Projects Commission [IMYO-003]
In the study, a simple, and efficient microextraction approach, which is termed as vortex-assisted ionic liquid-based dispersive liquid-liquid microextraction (VA-IL-DLLME), was developed for flame atomic absorption spectrometric analysis of aluminum (Al) and chromium (Cr) in vegetables. The method is based on the formation of anionic chelate complexes of Al(III) and Cr(VI) with o-hydroxy azo dye, at pH 6.5, and then extraction of the hydrophobic ternary complexes formed in presence of cetyltrimethylammonium bromide (CTAB) into a 125 mu L volume of 1-butyl-3-methylimidazolium bis(trifluorosulfonyl) imide [C4mim][Tf2N]) as extraction solvent. Under optimum conditions, the detection limits were 0.02 mu g L-1 in linear working range of 0.07-100 mu g L-1 for Al(III), and 0.05 mu g L-1 in linear working range of 0.2-80 mu g L-1 for Cr(VI). After the validation by analysis of a certified reference material (CRM), the method was successfully applied to the determination of Al and Cr in vegetables using standard addition method.
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