The ability to use imprinted polymers for solid-phase extraction is demonstrated in a model pre-concentration of bupivacaine from human plasma samples prior to gas chromatography. Imprinting of the structural analogue pentycaine yielded a sorbent which efficiently extracted analyte and internal standard, while possible interference on analyte quantification from leakage of remaining template mo...

Abstract Sample pretreatment is one of the most crucial and error-prone steps an analytical procedure; it consents to improve selectivity sensitivity by sample clean-up pre-concentration. Nowadays, arousing interest in greener sustainable chemistry has increased development microextraction techniques as alternative preparation procedures. In this review, we aimed show two different categorizati...

solid phase extraction (spe) cartridge embedded with octadecyl c18 chain bounded to silica particles were used for the isolation and trace enrichment of pesticides from water samples collected from cotton, rice growing and municipal areas. the eluents were analyzed with high performance liquid chromatography (hplc) using methanol (100%) as mobiles phase at different uv-visible wavelengths. ddt ...

The aim of this study was to develop an efficient quantitative method for the determination of acetaldehyde (AA) and formaldehyde (FA) contents in solid and liquid food matrices. The determination of those compounds was validated and performed using gas chromatography-mass spectrometry combined by solid phase micro-extraction after derivatization with O-(2,3,4,5,6-pentafluoro-benzyl)-hydroxylam...

This work examines a newly developed dynamic air sampling technique, known as HighSurface Area Solid Phase Micro Extraction (HSA-SPME), in sampling and analysis of chemical warfare agent surrogate and degradation compounds. The polymer coating of this device has 10 times the surface area of commercially available SPME fibers, and at high sample flow rates (4 L·min) provided increased extraction...