Extraction on the solid phase is a rapid, simple, effective, and flexible method of preparation of samples for the analysis proper and it can be used in many areas of analysis (pharmacy, biochemistry, food industry, environmental examination, etc.). Possible use in on-line and automatic systems is also advantageous. A very wide scale of proposed sorbents and the use of their combinations thus make extraction on the solid phase an effective method for the isolation and preconcentration of the analyte from the complex matrix of the sample.

        Key words: sorbents - extraction - SPE