The paper describes the execution and the results of the quantitative chemical analysis of bottom sediment samples and the determination of their phase composition, grain size distribution and organic particle content. The sediments came from a fish pond located in the vicinity of Kraków. The investigations were caried out using both conventional methods and modern techniques of instrumental analysis such as thermogravimetry, mass spectrometry, scanning electron microscopy, X-ray diffractometry and grain size analysis. A method was proposed for calculating quartz content on the basis of an analysis of the thermal effect that occurs during the heating of the sample. It was found that the use of various methods of instrumental analysis makes it possible to obtain reliable data by substantially eliminating the influence of the researcher on the results.

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