| Abstract: | Summary 1. The vanadylporphyrin complexes of the petroleum oils of the Buzachi peninsula have been studied by the ESR method and spectrophotometrically. The results of the investigation show that the ESR method is the most convenient for determining small amounts of vanadylporphyrins in petroleum oils and extracts.2. The selectivity of various solvents in the extraction of vanadylporphyrin complexes from petroleum oils, as determined by the ESR method, is discussed.Institute of the Chemistry of Petroleum and Natural Salts, Academy of Sciences of the Kazakh SSR, Gur'ev. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 389–392, May–June, 1978. |
