Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1247392 | Talanta | 2017 | 5 Pages |
Abstract
A method has been developed for the separation and determination of a set of 11 impurities from chromium matrices using oxalate form of Amberlite IRA 93. Due to slower kinetics of formation of the anionic complex, Cr(III) passed in the effluent while impurities forming strong complexes rapidly are retained on the exchanger. The adsorption of impurities of interest is found to be uniform in pH range 2-6. The adsorbed impurities are eluted with 2 mol lâ1 HNO3 and determined by inductively coupled plasma-optical emission spectrometer (ICP-OES). The percentage recoveries of Al, Bi, Cd, Co, Cu, Fe, Mn, Ni, Pb, Ga and Zn are in the range 88-101% and separation of matrix is >99.9%. The method has been applied for the analysis of two samples namely CrCl3·6H2O and Cr. The R.S.D. of the method is 5-6% at >10 μg gâ1 level and â¼15% at <1 μg gâ1 level. The process blank values are in the range sub-μg gâ1 and detection limits are in ng gâ1 range.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
G. Venkateswarlu, A.C. Sahayam, S.C. Chaurasia, T. Mukherjee,