Stir bar-sorptive extraction, solid phase extraction and liquid-liquid extraction for levetiracetam determination in human plasma: comparing recovery rates

Stir bar-sorptive extraction, solid phase extraction and liquid-liquid extraction for levetiracetam determination in human plasma: comparing recovery rates

Levetiracetam (LEV), an antiepileptic drug (AED) with favorable pharmacokinetic profile, is increasingly being used in clinical practice, although information on its metabolism and disposition are still being generated. Therefore a simple, robust and fast liquid-liquid extraction (LLE) followed by highperformance liquid chromatography method is described that could be used for both pharmacokine...

Solid Phase Extraction Using Modified Magnetic Iron Oxide Nanoparticles for Extraction and Spectrofluorimetric Determination of Carvedilol in Human Plasma Samples

A new analytical approach was developed involving magnetic solid–phase extraction and spectrofluorimetric determination of carvedilol in human plasma samples. A plasma sample was prepared and adjusted to pH 8.2–10, then carvedilol was quickly extracted using iron oxide magnetic nanoparticles modified by the surfactant cetyltrimethylammonium bromide and determined to apply spectrofluorimetry...

Solid phase extraction and high performance liquid chromatography for the determination of azithromycin in human plasma.

An effective, selective and sensitive method for the determination of azithromycin in plasma using high performance liquid chromatography-electrochemical detection (HPLC-ECD) extracted by solid phase extraction was developed and validated. Clarithromycin was used as an internal standard. Azithromycin was extracted from 1 ml of plasma using an Oasis HLB solid-phase extraction cartridge and the e...

Stir Bar Sorptive Extraction (SBSE) applied to Environmental Aqueous Samples

Determination of antipyrine metabolites in human plasma by solid-phase extraction and micellar liquid chromatography.

A rapid solid-phase extraction (SPE) procedure was developed for the quantitative isolation of three important antipyrine (dipyrone) metabolites from human plasma: 4-formylaminoantipyrine (FAA), 4-aminoantipyrine (AA) and 4-methylaminoantipyrine (MAA). Separation and quantitation were performed using micellar liquid chromatography (MLC) with a 0.1 mol l-1 sodium dodecyl sulfate (SDS)-2.5% penta...