Magnetic solid-phase extraction for the analysis of bisphenol A, naproxen and triclosan in wastewater samples

Abstract

Magnetic FeO graphene oxide nanocomposite was synthesized by chemical coprecipitation method and characterized by scanning electron microscopy, Fourier transform infrared spectra and X-ray diffraction. A simple, rapid, convenient and environmentally friendly method was developed for separation and pre-concentration of trace amounts of bisphenol A, naproxen and triclosan in wastewater samples by high performance liquid chromatography with magnetic FeO graphene oxide nanocomposite as the adsorbent for magnetic solid-phase extraction. Various parameters possibly influencing the extraction performance such as amount of the adsorbent, extraction time, sample pH and elution conditions were optimized. Under the optimal working conditions, the developed method showed good linearity (R > 0.9997) in the range of 1-200 μg/L, and the limits of detection are between 0.5 and 0.8 μg/L. The enrichment factors are in the range of 81-89. The repeatability of the method, expressed as relative standard deviation, is 3.36-4.26%.

Determination of four bisphenols in water and urine samples by magnetic dispersive solid‐phase extraction using a modified zeolite/iron oxide composite prior to liquid chromatography diode array detection

“…Both advantages significantly cut the extraction procedure duration. Recently, the number of studies reporting BP preconcentration using magnetic or magnetizable materials has increased (i.e., modified magnetic nanoparticles , carbon microspheres , graphene , molecularly imprinted polymer , and metal organic framework , among others). Nowadays, one of the main MDSPE‐related research topics involves the search for new sorbents with good selectivity and high adsorption capacity, which are thermally and chemically stable, economical, and environmental friendly.…”

An efficient biosorption‐based dispersive liquid‐liquid microextraction with extractant removal by magnetic nanoparticles for quantification of bisphenol A in water samples by gas chromatography‐mass spectrometry detection

“…Considering the complexity of real environmental matrices and trace levels of BPA, a highly sensitive and selective sample preparation is usually required to extract and concentrate BPA, eliminate major background interferences, and achieve adequate sensitivity prior to instrumental analysis. Numerous sample preparation techniques have been proposed to extract and concentrate BPA in environmental samples such as soxhlet extraction [21], SPE [22], pressurised liquid extraction [23], dispersive liquid-liquid microextraction (DLLME) [24], MSPE [25], ultrasoundassisted SPE extraction [11], microsolid phase extraction [5], SPME [26], microwave-assisted solvent extraction-SPE [27], temperature-controlled ionic liquid DLLME [28], and biosorption based DLLME (Bio-DLLME) [29].…”

Magnetic dispersive solid-phase extraction using ZSM-5 zeolite/Fe2O3 composite coupled with screen-printed electrodes based electrochemical detector for determination of cadmium in urine samples

“…Finally, analytes can be eluted using a proper solvent or thermally desorption for further determination [23]. Nowadays, this technique is widely used due to the development of new magnetic materials [24][25][26][27][28]. Some works have recently reported combination of MDSPE technique with electrochemical detection SPEs [29][30][31].…”