A NEW METHOD FOR THE DETERMINATION OF S, V, FE, NI, PB AND OTHER ELEMENTS IN SOME DISTILLED FRACTIONS OF CRUDE PETROLEUM BY TXRF

The possibility of employing the Total Reflection X-ray fluorescence ( TXRF) technique for the analysis of some derivatives of petroleum crud e oil (Petrol, Diesel oil, Fuel oil), is demonstrated with the help of certified standards (NIST, ENEL, ICIP). The quantitative analysis is conducted via an internal standard method. Some problems about element s volatility (S in Diesel oil and Pb in Petrol) are solved to permit a n accurate quantitative simultaneous determination of the elements (fr om Z = 13 to Z = 90 with a detection limit in the range from ppb to pp m) present in the samples of petroleum derivatives. The analyses are c onducted with a new Total Reflection X-ray spectrometer (TX 2000 suppl ied by Pal Structures)