Abstract:
The petroleum porphyrins (petroporphyrins) were first discovered in 1934 by Alfred Treibs, who also found tetrapyrroles in a
wide range of organic matter, asphalt, oil shale and coal. Vanadyl porphyrin distribution of Carpathian petroleogenetic rocks from
Pitesti petroleum (Romania) offshore field is analyzed in this paper by ultraviolet and visible spectrophotometry, Fouriertransformed
infrared spectroscopy, inductively coupled plasma atomic emission spectrometry, X-ray fluorescence spectroscopy
and electron spin resonance. Results show that vanadyl porphyrins are present in the total Carpathian petroleogenetic rocks from
various crude oil deposits.

Rodica?Mariana Ion, Irina Dumitriu, Radu?Claudiu Fierascu