Autorzy prezentują procedurę odejmowania spektralnego na przykładzie mieszaniny octanu metylu i aceto/enolu. Wskazują istotną rolę prawidłowego doboru współczynnika odejmowania k na jakość otrzymanego widma. Przedstawiona została metoda pozwalająca na bezpośrednie oszacowanie współczynnika k bez konieczności korzystania z dopasowania automatycznego.

There are many factors which influence the concentration of suspension in sea wa-ter. These includethe distance from the estuary, geological structure of the shore and seabed, direction and speed of tidal current and drift, as well as wave height. The results of research presented in the article show the effect of the wind force on the sedimenta-tion in offshore areas of water reservoirs.

The process of progressive degradation of natural environment of the Baltic Sea and the Odra River caused by oil products has been presented. The authors describe the examined area and measurement techniques. The mean values of oil contamination of the Odra River superficial layer have been calculated on the basis of measurements carried out for many years. Besides, the distribution of the oil pollution of water in the perpendicular cross-section at selected points of the Odra River has been presented.

For many years the analysis of concentration residual hydrocarbon and oil in sam-ples of water and soil has been performed using transmission infrared spectroscopy. However, this method will have to be modified due to the prohibition of the use of car-bon tetrachloride, used as a solvent in this method. Another method of measuring the absorption of infrared radiation is horizontal attenuated total reflection( HATR), where benzene could be used as a solvent. A description of the HATR method, its advantages and disadvantages are presented.