Metals, including vanadyl and nickel porphyrins, in the oil shales of Timahdit, Morocco

@inproceedings{Saoiabi1983MetalsIV,
  title={Metals, including vanadyl and nickel porphyrins, in the oil shales of Timahdit, Morocco},
  author={A. Saoiabi and M. Ferhat and Jean Michel Barbe and Roger Guilard},
  year={1983}
}
Abstract Vanadyl and nickel porphyrins have been isolated from a Cretaceous oil shale (Timahdit, Morocco) by solvent extraction and chromatography. Electronic absorption spectrophotometry and mass spectrometry have been used in the determination of the nature and proportion of the isolated complexes. A distinction between the metal content associated with porphyrinic systems and that associated with inorganic materials is made on the basis of metal determinations carried out on the bituminous… CONTINUE READING