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An influence of concentration of surfactants and time of ultrasound treatment on value of analytical signal at atomic-absorption and atomic-emission with inductive connected plasma determination of analysts in oil products was studied. It was shown that using of our sample preparation increases sensibility in 1,5-2,0 times. These results were also proved by the new processing program. By means of by variation of the sample mass we show an absence of perfect systematical error . By the method “injected-found out” an accuracy of the results of atomic-absorption determination of Zinc and Manganese was estimated . Coherence of the results, obtained by two independent methods, was estimated by F-and tcriteria. It was shown that dispersions are homogenous and results are distinguished not sufficiently. We also estimated the limit of founding out of analytes by atomicabsorption method. It was shown that our results are lower than literature data. This is because of application of standard samples based on acetylacetanates of metals.

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ATOMIC-ABSORPTION AND ATOMIC-EMISSION WITH INDUCTIVE CONNECTED PLASMA DETERMINATION OF THE ANALYTS IN OIL PRODUCTS WITH USE OF MODERN METHODS OF SAMPLE PREPARATION AND NEW STANDARD COMPOSITION SAMPLES