Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1246691 | Talanta | 2010 | 5 Pages |
Abstract
A simple, rapid and selective one-step displacement cloud point extraction (D-CPE) procedure was developed for the simultaneous preconcentration of trace Cu and Ag followed by flame atomic absorption spectrometric (FAAS) measurement. In this proposed procedure, Ni-DDTC complex instead of DDTC was used to achieve one-step extraction. Since the stability of Cu-DDTC and Ag-DDTC is higher than that of Ni-DDTC, simultaneous preconcentration of Cu and Ag can be achieved in a single step. Up to 15,000 mg Lâ1 Co2+, 10,000 mg Lâ1 Zn2+, 5000 mg Lâ1 Cd2+ and 5000 mg Lâ1 Al3+ did not cause significant interferences for the determination of 50 μg Lâ1 Cu by FAAS, while 8000 mg Lâ1 Zn2+, 4000 mg Lâ1 Co2+, 4000 mg Lâ1 Cd2+ and 5000 mg Lâ1 Al3+ had no distinct effect on the determination of 80 μg Lâ1 Ag. The limits of detection (LODs) of 0.5 μg Lâ1 for Cu and 1.0 μg Lâ1 for Ag, respectively, were obtained by FAAS detection. The accuracy of the proposed method is validated by analyzing certified reference materials (GBW 07405, GBW 07311 and GBW 07260) with satisfactory results. Furthermore, the one-step D-CPE was also applied for the preconcentration/separation of Cu and Ag in high-purity salts and artificial seawater, followed by FAAS or inductively coupled plasma-mass spectrometry (ICP-MS) determination.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ying Gao, Peng Wu, Wei Li, Yuelan Xuan, Xiandeng Hou,