Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7639997 | Microchemical Journal | 2018 | 6 Pages |
Abstract
A novel green supramolecular solvent-based liquid-liquid microextraction (SsLLME) method was developed and validated for preconcentration of thorium(IV) in various environmental samples. The presented preconcentration method was based on using 1-decanol/THF as supramolecular solvent phase and quinalizarin as a chelating agent. Thorium(IV)-quinalizarin hydrophobic complex was obtained at pHâ¯6.0, extracted into the supramolecular solvent phase, centrifuged and then the absorbance was measured spectrophotometrically at 590â¯nm. The impact of some variables on the efficiency of microextraction; pH, amount of quinalizarin, and supramolecular solvent type, ratio and volume, ultrasonication and centrifugation time, sample volume and influence of matrix ions; was optimized. Linearity ranged from 2.0 to 100â¯Î¼gâ¯Lâ1 with a limit of detection (LOD) of 0.40â¯Î¼gâ¯Lâ1. The preconcentration factor (PF) was found to be 40. The precision of the method was confirmed with its low RSD% (1.4). The developed method was applied to the analysis of real water and soil samples. The validity was checked with certified reference materials such as IAEA Lake Sediment SL-1 and IAEA-soil-7.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ayman A. Gouda, Manal S. Elmasry, Hisham Hashem, Heba M. EL-Sayed,