Solid phase extraction using nanofibrous sorbents prior to liquid chromatography for determination of drugs and contaminants

Charles University Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistry Candidate: Jana Nastoupilová Supervisor: PharmDr. Ivona Lhotská, Ph.D. Title of diploma thesis: Solid phase extraction using nanofibrous sorbents prior to liquid chromatography for determination of drugs and contaminants The diploma thesis is focused on the optimization of a new type of solid-phase extraction (SPE) using nanofibrous sorbents filled in centrifugal filters for the determination of contaminants (bisphenols) and drugs. The aim is to increase the quantity of parallel analyses. The composite polymer nPCL/µPCL (nano and microfibers of polycaprolactone) was chosen as the tested sorbent because of its promising results in previous works. The aim of the diploma thesis was optimization of conditions for extraction and validation of the method. The method of choice was microextraction, when discs from nanofibrous sorbent were cut and then filled in centrifugal filters. A centrifuge was used for passing liquid through the sorbent. Analysis was carried out by UHPLC (chromatography column YMC-Triart C18 ExRS, size 100x4.6 mm, particle size 3 µm) and detection was performed by DAD detector (210 and 220 nm). During the optimization, number of nanofibrous discs filled in centrifugal filters, volume of..