Abstract

Pesticides are a global risk because they move with the wind, rain and sea currents from other regions, which makes getting to places which were never used before. Their presence was detected in all types of water circulating in the ecosystem, which is an easy source of exposure to life and health of all living organisms. Currently, it is considered one of the most dangerous and toxic pollutants, which fate and function is still largely unknown. Therefore, constant monitoring is needed to the content of these xenobiotics in the environment. Traditional analytical procedures for the determination of these pollutants are usually laborious and time-consuming, requiring the use of large quantities of toxic and expensive solvents and are often characterized by a low coefficient of enrichment. Therefore, there is a need to develop a new analytical methodologies, which allow in a quick, cheap and environmentally safe means determining pesticides from different chemical groups (mainly organophosphorus and organonitrogen pesticides and pyrethroids). The dispersive liquid-liquid microextraction (DLLME) has emerged as an attractive alternative for traditional liquid - liquid extraction (LLE), because it is fast, inexpensive, easy to operate, consumes low volume of organic solvent and provides high enrichment factors. This paper presents examples of application of DLLME for control and monitoring pesticides residue in water samples. The advantages and drawbacks of this technique are also discussed, and some solutions to its limitation are proposed. This research work was supported by National Science Centre (decision number: DEC-2011/01/N/ST4/01977) and the system project: "InnoDoktorant - Scholarships for PhD students, IVth edition". Project is cofinanced by the European Union in theframe of the European Social Fund.

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