| Popis: |
Composition of bauxite samples was determined by ICP-AES. Twelve trace and two matrix elements are investigated: Ba, Cr, Cu, La, Mn, Mg, Sr, Ti, V, W, Y, and Zn and Al and Fe, respectively. Three types of evaluation methods are employed and the results compared to each other as well as to the certificates of standard bauxite samples. Of these three methods one is a single-element evaluation, the second is the Kaiman filter technique, and the third is a multivariate calibration method. In terms of a general assessment of the Kaiman filter, it can be observed that in the example given this method is not much better than the single-element method. The Kaiman filter accomodates all the points in a spectrum including those with high error. In trace element analysis, however, the Kaiman filter performs better and gives more reliable results. |
