Ionic-liquid-modified magnetic nanoparticles as a solid-phase extraction adsorbent coupled with high-performance liquid chromatography for the determination of linear alkylbenzene sulfonates in water samples

Abstract

Novel ionic-liquid-functionalized Fe O magnetic nanoparticles were synthesized by the thiol-ene click reaction. The prepared functionalized Fe O nanoparticles possessed multiple interactions, such as electrostatic, hydrophobic, and π-π interactions. The functionalized Fe O nanoparticles were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometry, and transmission electron microscopy. Four kinds of linear alkylbenzene sulfonates, namely, sodium decylbenzenesulfonate, sodium undecylbenzene sulfonate, sodium dodecylbenzenesulfonate, and sodium tridecylbenzenesulfonate, were selected as model compounds to evaluate the applicability of adsorbents for extraction and subjected to high-performance liquid chromatography analysis. In addition, the effects of various parameters, such as sorbent amount, pH value, ionic strength, sample volume, extraction time, and elution conditions on extraction efficiency were studied in detail. Under the optimum conditions, good linearities were attained, with correlation coefficients between 0.9912 and 0.9968. The proposed method exhibited limits of detection ranging from 0.061 to 0.099 μg/L for all the target analytes. The spiked recoveries of the target analytes in real water samples ranged from 86.3 to 107.5%, with relative standard deviations lower than 7.96%. The enrichment factors of the analytes ranged from 364 to 391, indicating that the obtained functionalized Fe O nanoparticles can effectively extract trace target analytes from environmental water samples.

Electropolymerized polyaniline on electrospun silica nanofibers to prepare a SPME fiber for the sampling of linear alkyl benzenes

“…The limited methods presented for the determination of LABs, including GC-FID and GC-MS techniques in marine sediments and wastewaters, have been reported in the literature. In these methods, before chromatographic analysis, solid phase extraction (SPE), liquid-liquid extraction, thin layer chromatography and Soxhlet extraction methods have been used to extract and preconcentrate the sample [21][22][23].…”

Simultaneous determination of steroid drugs in the ointment via magnetic solid phase extraction followed by HPLC-UV

“…Nanocomposites with core-shell structure consisting of two or more different nanoscale materials have aroused more interests among researchers. Core-shell nanocomposites not only provide the stability for the nanocomposites in solution but also facilitate their binding with various ligands for various applications such as drug delivery, cancer hyperthermia treatments magnetic, and separation [1] , [2] , [3] , [4] , [5] . Comparison with other nanocomposites, the surface of core-shell nanocomposites is more uniform and can be functionalized conveniently.…”

Evaluation of a mixed anionic–nonionic surfactant modified eggshell membrane as an advantageous adsorbent for the solid‐phase extraction of Sudan I–IV as model analytes

“…The core of SPE is the adsorbent that determines the selectivity and sensitivity of the method. However, the widely used commercial SPE adsorbents, such as bonded silicas (C 8 , C 18 ), Graphene , Alumina N , and nanomaterials are often limited by their shortcomings, such as the high costs, potential health, and environmental risks and the narrow applicable ranges. Thus, developing new SPE adsorbents is of high value.…”