Energy dispersive X-ray fluorescence analysis of marine pollution indicators

The present work shows a methodology for the application of EDXRF with a X- ray tube, in the analysis of elements in the following matrices: microalgae , marine algae, marine sediments and corals. Various methods were applied: one using a relative external standard, a fundamental parameters method, an absolute method based on elemental sensitivity, a method which used X-ray fluorescence excitation measured in the back side of the sample for low con tents heavy elements determination and a TRXRF method. The thin layer sampl es were prepared using a plastic resin. The analyzed samples of marine alga e, marine sediments and corals belong to a marine ecosystem from the North of Havana City, the most affected area by natural metereological phenomena and human impact.