Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559846 | Talanta | 2011 | 6 Pages |
Abstract
A novel adsorbent-silica gel bound dithizone (H2Dz-SG) was prepared and used as solid-phase extraction of copper from complex matrix. The H2Dz-SG is investigated by means of FT-IR spectra and the SEM images, demonstrating the bonding of dithizone. The H2Dz-SG quantitatively adsorb copper ions, and the retained copper is afterwards collected by elution of 10% (v/v) nitric acid. An on-line flow injection solid-phase extraction procedure was developed for trace copper separation and preconcentration with detection by flame atomic spectrometry. By loading 5.4 mL of sample solution, a liner range of 0.5-120 μg Lâ1, an enrichment factor of 42.6, a detection limit of 0.2 μg Lâ1 and a precision of 1.7% RSD at the 40 μg Lâ1 level (n = 11) were obtained, along with a sampling frequency of 47 hâ1. The dynamic sorption capacity of H2Dz-SG to Cu2+ was 0.76 mg gâ1. The accuracy of the proposed procedure was evaluated by determination of copper in reference water sample. The potential applications of the procedure for extraction of trace copper were successfully accomplished in water samples (tap, rain, snow, sea and river). The spiking recoveries within 91-107% are achieved.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Hong-Mei Yu, Hua Song, Ming-Li Chen,