Scientific interests:

application of solid phase microextraction (SPME) and dispersive liquid-liquid microextraction (DLLME) to isolation and preconcentration trace amounts of heavy metals and organic contaminants (such a pesticides, aromatic amines, parabens, bisphenols) in environmental samples, 

modification of microextraction techniques in according to the principles of Green Analytical Chemistry by use “green solvents” (ionic liquids, deep eutectic solvents), new sorbents and factors supporting the efficiency of extraction.

Selected publications:

Werner, J. (2018). Ionic liquid ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of the aqueous phase for preconcentration of heavy metals ions prior to determination by LC-UV, Talanta , 182, 69-73.

Werner, J., Grześkowiak, T., Zgoła-Grześkowiak, A., Stanisz, E. (2018). Recent trends in microextraction techniques used in determination of arsenic species, Trends Analytical Chemistry, 105, 121-136.

Werner, J. (2016). Determination of metal ions in tea samples using task-specific ionic liquid-based ultrasound-assisted dispersive liquid-liquid microextraction coupled to liquid chromatography with ultraviolet detection, Journal of Separation Science, 39, 1411-1417.

Zgoła-Grześkowiak, A., Werner, J., Jeszka-Skowron, M., Czarczyńska-Goślińska, B. (2016). Determination of parabens in cosmetic products using high performance liquid chromatography with fluorescence detection, Analytical Methods, 8, 3903-3909.

Stanisz, E., Werner, J., Zgoła-Grześkowiak, A. (2014). Liquid phase microextraction techniques based on ionic liquids for preconcentration and determination of metals, Trends Analytical Chemistry, 61, 54-66.

Stanisz, E., Werner, J., Matusiewicz, H. (2014). Task specific ionic liquid-coated PTFE tube for solid-phase microextraction prior to chemical and photo-induced mercury cold vapour generation, Microchemical Journal, 114, 229–237.