Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7643911 | Microchemical Journal | 2013 | 4 Pages |
Abstract
A plasticised PVC membrane containing pyrochatecol violet as complexing reagent has been used to extract and pre-concentrate Cu2 + ions from aqueous solution, aiming at their determination by Laser Induced Breakdown Spectroscopy. The membrane was prepared from a THF cocktail solution on a cellulose acetate support by the dip-coating technique, providing a homogeneous distribution of the complexing reagent and a thickness of 3 μm. The extraction was straightforwardly performed by immersing the membrane in the Cu2 + sample solution buffered at pH 6.0 with sodium acetate. The extraction time defined the working analytical range (from μg Lâ 1 to mg Lâ 1) and a 50-min extraction provided a detection limit of 15 μg Lâ 1 for Cu2 + ions. The membrane is stable for at least 2 months when stored in a desiccator, allowing in-field extractions, that avoid sampling, storage and transport of the aqueous sample to the laboratory.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Klécia M. Santos, Juliana Cortez, Ivo M. Jr., Celio Pasquini, Elane S. Boa Morte, Maria Graças A. Korn,