Abstract
A simple and sensitive supramolecular solvent microextraction method was developed for the separation, preconcentration and determination of trace levels of copper in food and environmental samples. The supramolecular solvent system consists of tetrahydrofuran (THF) and undecanol and was used as an extraction solvent for the microextraction procedure of Cu(II). A supramolecular solvent microextraction procedure for copper(II) as its 5-methyl-4-(2-thiazolylazo) resorcinol (5-ME-TAR) complex was established prior to microsampling flame atomic absorption spectrometric determination. The influence of various analytical parameters including pH, solvent type and volume, amount of 5-methyl-4-(2-thiazolylazo) resorcinol, and centrifugation time were investigated. The effects of certain alkali, alkaline earth, and transition metal ions on the quantitative extraction of copper(II) were also studied. The proposed supramolecular solvent-based microextraction procedure exhibits a limit of detection (LOD) of 1.4 μg L −1 and a limit of quantification (LOQ) of 4.6 μg L −1 . A preconcentration factor of 60 was obtained and the relative standard deviation was 2.78%. The method was validated by the analysis of certified reference materials and applied to food, spices, and water samples.
| Original language | English |
|---|---|
| Pages (from-to) | 17-23 |
| Number of pages | 7 |
| Journal | Atomic Spectroscopy |
| Volume | 40 |
| Issue number | 1 |
| State | Published - 1 Jan 2019 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 PerkinElmer, Inc. All rights reserved.
ASJC Scopus subject areas
- Spectroscopy