Insitu ultrasound-assisted synthesis of Fe3O4 nanoparticles with simultaneous ion co-precipitation for multielemental analysis of natural waters by total reflection X-ray fluorescence spectrometry

2014 Atomic Spectrometry Update – a review of advances in X-ray fluorescence spectrometry

“…The combination of UAE and TXRF spectrometry provided a simple means for assessing the potential metal mobility and bioavailability. Romero et al 71 described an in situ ultrasound-assisted magnetite synthesis with simultaneous ion co-precipitation, applied to magnetic solid-phase extraction (MSPE) of As, Au, Bi, Cu, Ge, Hg, Re, Pb, Tl, and Zn. The MSP enriched with metal ions was directly analysed by TXRF.…”

New sonochemical magnetite nanoparticles functionalization approach of dithiooxamide–formaldehyde developed cellulose: From easy synthesis to recyclable 4‐nitrophenol reduction

“…In the present work, the deposition of magnetite NPs on [FA‐c‐(C‐DTX)] was assisted by sonochemistry The sonofabrication of [FA‐c‐(C‐DTX)@Fe 3 O 4 ] was carried first in an open container to form Fe (OH) 2 then under inert atmosphere because Fe 3 O 4 NPs are extremely sensitive to oxygen so that they can be oxidized by air during sample preparation. [ 76 ] Additionally, according to the reported literature, Fe 2+ ion's local concentration at the solid/water interface is higher than in the aqueous bulk phase. [ 75 ] Iron ions with positive charge are more preferable to be concentrated near the surface due to the electrostatic attraction and the negative surface charge of the substrate under alkaline conditions.…”

In situ growth of Fe3O4nanoparticles for dispersive magnetic micro-solid phase extraction of cadmium followed by ETAAS detection

“…The nanosized magnetite was synthesized in situ according to the procedure described elsewhere. 30 Briey, 5.30 mg of FeCl 3 $6H 2 O and 7.8 mg of FeCl 2 $4H 2 O were dissolved in 20 mL of sample/ standard solution and subjected to ultrasound irradiation for 1 min. Then, concentrated ammonia was rapidly poured into the reaction medium and sonication was applied for 4 min.…”

“…This strategy was rst reported by our group aimed at using total reection X-ray uorescence (TXRF) analysis. 30 The main shortcoming of this technique is due to the presence of high amounts of Fe 3 O 4 NPs. TXRF spectra show an intense peak for Fe that overlaps the peaks for elements with spectral lines below 6.40 keV.…”