Development of monolithic sorbent cartridges (m-SPE) for the extraction of non-steroidal anti-inflammatory drugs from surface waters and their determination by HPLC

Synthesis of magnetic date stone biochar for solid phase extraction of NSAIDs from water samples

“…29 This solvent has been widely used in various works for the extraction of NSAIDs. 30 The pH of the sample solution was kept at 3.5, and at this value lower than p K a of NSAID and pH pzc of MDSBC, the protonation of the surface would prevent the sorption of neutral NSAIDs. 17…”

“…29 This solvent has been widely used in various works for the extraction of NSAIDs. 30 The pH of the sample solution was kept at 3.5, and at this value lower than pK a of NSAID and pH pzc of MDSBC, the protonation of the surface would prevent the sorption of neutral NSAIDs. 17 Cheng et al, reported that the large surface afforded by MDSBC facilitates strong adsorption for their p-p electrostatic interactions with the aromatic rings of the targets which explained the adsorption capacity variation and thus limited the number of actives sites.…”

Evaluation of organo-vermiculites as sorbent phases for solid-phase extraction of ibuprofen from water

“…However, due to high consumption of organic solvents and their toxicity, other techniques have been developed, such as solid-phase extraction (SPE), with lower consumption of organic/toxic solvents and which is easier to automate when compared to LLE. [3][4][5] SPE is a technique that consists essentially of using a solid phase as a sorbent for extraction of one or more analytes, making use of relatively high volumes of the sample in the sorption step and low volumes of an appropriate solvent or mixture of solvents during desorption, 6 to decrease the limits of quantication (LOQ). All steps in a SPE procedure are very important, since mistakes may result, e.g., in the loss of analytes, compromising the analytical protocol.…”

Exploration of a Molecularly Imprinted Polymer (MIPs) as an Adsorbent for the Enrichment of Trenbolone in Water

“…In addition, the most attractive advantage for analytical chemists is the possibility of using a reduced amount of organic solvents and the fact that SPE is highly tuneable with regard to the adsorbents used [35]. Previously, silica-bonded phases such as C 18 have been used for as adsorbents for SPE of wide range of organic pollutants [33,[40][41][42][43][44]. However, recently, modified and tuned solid phase materials have been used to achieve more specificity [45].…”