Speciation of ultra-trace amounts of inorganic arsenic in water and rice samples by electrothermal atomic absorption spectrometry after solid-phase extraction with modified Fe₃O₄nanoparticles

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…A new magnetic adsorbent, 3-mercaptopropionic acid coated 3-aminopropyl triethoxysilane modified MNPs, is used for the extraction and preconcentration of arsenic ions in aqueous solutions followed by determination using electrothermal atomic absorption spectrometry (AAS). Under the optimum conditions, wide linear range of 30-25,000 ng L −1 and low detection limit of 10 ng L −1 are obtained [137]. An coupled Au/Fe3O4/GO hybrid material improves the catalytic activity, stability, and separation capability of AuNPs and Hg 2+ [138].…”

Preconcentration and speciation of chromium species using ICP-OES after ultrasound-assisted magnetic solid phase extraction with an amino-modified magnetic nanocomposite prepared from Fe3O4, MnO2 and Al2O3

“…The magnetic Fe 3 O 4 nanoparticles were prepared by the conventional co-precipitation method previously published with minor modifications [12]. In this method, a mixture containing 20.21 g of FeCl 3 .6H 2 O and 10.05 g of FeCl 2 .4H 2 O was dissolved in 300 mL deionized water under nitrogen atmosphere with vigorous stirring at 85°C.…”

“…Quantification of chromium in water is therefore essential for environmental assessment and remediation purposes. Therefore, sample preparation methods that can separate different species of the same metal have been developed [2,[10][11][12]. However, total chromium concentration in water does not give satisfying results regarding the bioavailability, bioaccumulation and toxicity of chromium [6].…”

“…These methods include; solid phase microextraction (SPME) [13], capillary microextraction (CME) [10], dispersive liquid-liquid microextraction [14] and magnetic solid phase extraction (MSPE) [11]. However, their modification with organic functional groups yields to adsorbents that are suitable separation and speciation of trace metals [12,24]. Amongst the aforementioned methods, MSPE is one of the sample preparation techniques that can be manipulated to ensure that it performs according to the stipulated objective.…”

Capillary electrophoresis‐based approaches for the study of affinity interactions combined with various sensitive and nontraditional detection techniques

“…On the other hand, another very important advantage of CE not mentioned above is the possibility of connecting it to various types of detector, mostly in a relatively simple way. A comparison of the main parameters of the detection techniques used and discussed below is summarized in Table .…”