Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560076 | Talanta | 2005 | 5 Pages |
Abstract
This work assesses for the first time the potential of natural Kaolinite as adsorptive material for preconcentration of metal traces. Manganese is quantitatively retained by 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) on thermal modified Kaolinite by column method in pH range of 8.5-10.0 at flow rate of 2 ml minâ1. Manganese was removed from column with 5.0 ml of H2SO4 4 mol lâ1 and determined by flame atomic absorption spectrometric at 279.5 nm. In this case, 0.l μg of manganese can be concentrated from 800 ml of aqueous sample (where concentration is as low as 0.125 μg lâ1). Detection limit is 4.3 μg lâ1 (3 δbl mâ1) and analytical curve is linear in the 0.02-10 mg lâ1 in final solution with correlation coefficient 0.9997 and relative standard deviation for eight replicate determination of 5 μg of manganese in final solution is 0.71%. The interference of a large number of anions and cations has been studied in detail to optimize the conditions and method was successfully applied for determination of manganese in complex materials.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Darush Afzali, Mohammad Ali Taher, Ali Mostafavi, Sayed Ziae Mohammadi Mobarakeh,