Quality assessment of heavy metals presented in crude oil by identification spectral lines by the LIPS - System

Petroleum is a complex mixture containing on the major and minor elements from organic and inorganic compounds and amounts of inorganic elements and metals. Compositional determination of crude oil is one of the most important topics for its identification and subsequent processing. In this study we identified the analytic lines of heavy metals (HMs) found in crude oil extracted from Iraq south field that are unique spectral by using the laser-assisted plasma (laser material processing) that led to the ionization of the sample in the hot plasma, the plasma emission spectrum was recorded by the spectrometer connected to the fiber optic and resolved spectra were used for identification of detected metals based on the principle the finger print. We are selection and determine the result optimum of the global reference line properties (highest signal intensity I, induce temperature Te) and lower skew value of analytic lines intensity when use the limited laser parameters and lower pretreatment time (drying time). After five pretreatment stages, the treatments by drying the sample at different time (1–9) day with constant temperature at 30 Co were executed. Found results are designated and compared in all cases and the atomic parameters of selected lines were taken by assisted NIST database. For control the challenge presented by the properties of the crude oil samples, as organic liquid case (crude oil). The optimum results obtained indicate that the LIBS - technique is effective and rapid technique to identify the heavy metals (HMs) presented in the crude oil. The major elements such as C, H, N, O and minor (trace) Fe, V, Ni, C
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, Cu, Co, Ce, Mn, Mo, Ti, Ta. Sc, U, W, Hg, Pb, Sm, Y, Tm, Er, Eu, Re, Zr, Dy, La, Rh, Ru, Th, Gd, Nb and Nd metals have been identified and their parameters calculated based on analysis of the spectrum that contain all information needed to derive the elemental analysis in the crude oil.