“…Beside technical reports, a number of papers with the subject of oil analysis can be found in literature [ 9 – 16 ]. In diverse papers the application of a wide range of analytical procedures and methods such as potentiometry [ 15 ], polarography [ 16 ], inductively coupled plasma [ 17 ], Fourier transformation infrared spectroscopy [ 18 , 19 ], atomic absorption spectroscopy [ 20 ], differential scanning gravimetry [ 21 ], X-ray fluorescence spectroscopy [ 22 ], laser-induced break down spectroscopy [ 23 ], spectrography [ 24 ], ferrography [ 25 ], mass spectrometry [ 26 ], and chromatography [ 27 ] have been described.…”