ICP-AES Determination of Trace Elements in Microsphere UO2 Coated Ni with Microwave Assisted Sample Digestion and Extraction Chromatographic Separation

Sample of microspheres of UO2 coated Ni was digested with a mixture of HNO3-HF (3+2), and the solution obtained was passed through CL-TBP extraction column for separation of the 10 elements, i.e., Co, Fe, Cr, Mg, Mn, Mo, Ni, Ti, Cu and V from U. 5.5 mol·L-1 HNO3 was used as mobile phase in elution. The eluate was used for ICP-AES determination of the 10 elements. Values of detection limit (3s) found were in the range of 0.01-0.08 mg·L-1. Tests for recovery and precision were made by standard addition method at 2 different concentration levels, giving values of recovery and RSD′s (n=6) in the ranges of 85.0%-106% and 0.9%-4.8% respectively.