TY JOUR TI DETERMINATION OF IMPURITIES IN OILS BY THE METHOD INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY KW P-MS KW corrosion losses KW oil JO Problems of risk management in the technosphere AU Ivakhniuk, S.G. AU Rodionov, V.A. PY 2015 IS 2015 PB Saint-Petersburg University of State Fire Service of Emercom of Russia