On the matrix effect in the determination of main components of dolomite by atomic flame emission and absorption spectrometry

The matrix effects in the determination of the main components of dolomite by flame emission (Na, K) and atomic absorption spectrometry (Ca, Mg, Fe, Mn) have been examined according to the methodology based on the theory of design of experiments. The influence of some auxiliary compounds added to a sample solution has been investigated. The determination of Fe and Mn proved to be specific. The matrix effect has been eliminated in the determination of K by adding a mixture of NaCl and H3PO4, in the determination of Na by KCl spectral buffer, in the determination of Mg by NaCl buffer and in the case of Ca by SrCl2 as a spectral buffer.