On-line solid-phase extraction and high performance liquid chromatography determination of polycyclic aromatic hydrocarbons in water using polytetrafluoroethylene capillary

An overview of sample preparation and extraction of synthetic pyrethroids from water, sediment and soil

“…However, as regards water samples of pyrethroids, probably SPE is the first method of choice. Coupling of SPE with different chromatographic techniques (SPE-HPLC, SPE-GC, SPE-GC/MS) has become a fully matured approach and has been used extensively in analysis of pesticides (including pyrethroids) and other organic pollutants in water [156][157][158][159][160]. However, in view of the fact that real environmental water samples have a high content of suspended particles on which pyrethroids are adsorbed, SPE will not be the preferred technique for the determination of the total pyrethroids in water since filtration of samples is usually necessary to prevent clogging of cartridges.…”

Analysis of lignans in Magnoliae Flos by turbulent flow chromatography with online solid‐phase extraction and high‐performance liquid chromatography with tandem mass spectrometry

“…Online SPE was performed on a Tuborflow TM C 18 eluting pump are shown in Table 1. The analysis process was as follows:…”

“…Turbulent flow chromatography (TF) is a method based on the principle of SEC to separate small molecule drugs from complex biological fluids such as urine, plasma, vitreous humor, and postmortem tissues . By using the online TF column for online SPE, the pretreatment can be direct and fast .…”

On-Line Sample Pre-Treatment Procedures Applied to LC–MS

“…This compared well against other on-line techniques referenced. [108][109][110][111] Sulfonamides are used widely as an antibiotic for farm animals, but at high concentrations they can be harmful, causing diarrhoea, nausea, skin rash, headaches, and dizziness. As a consequence sulfonamides are routinely monitored within the food industry to ensure that food is safe for human consumption.…”