Renewable column on-line magnetic preconcentration of Cd(II) using Fe3O4 nanoparticles functionalized with l-glutamine for determination by flame atomic absorption spectrometry

Flow-Injection Methods in Water Analysis—Recent Developments

“…Spectrometry with flame atomization was used in the FIA determination of Cd(II) [120], and Cr(III) [121], in both cases using on-line analyte enrichment with ion-imprinted polymers, with appropriate cavities produced during the polymerization for the selective uptake of the given ions. Determinations of Cd(II) were carried out, with preconcentration on magnetic ligand-functionalized nanoparticles [122], while for the Yet another application of molecular spectroscopy in the UV-Vis range is the use of thermal lens spectroscopy in an FIA system for the sensitive determination of Ag(I), based on the formation of colloidal silver nanoparticles [99]. This detection is based on the measurement of the temperature rise of an illuminated sample and the index of refraction modification as a result of nonradiative relaxation of the energy absorbed by the analyte from a laser.…”

“…Flow-injection systems with on-line sample-processing operations, employed mostly for analyte preconcentration or the elimination of interfering matrix components, are also combined with atomic spectroscopy instruments [120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135]. They are commonly used for determining numerous trace elements in water analysis (Table 3).…”

“…Spectrometry with flame atomization was used in the FIA determination of Cd(II) [120], and Cr(III) [121], in both cases using on-line analyte enrichment with ion-imprinted polymers, with appropriate cavities produced during the polymerization for the selective uptake of the given ions. Determinations of Cd(II) were carried out, with preconcentration on magnetic ligand-functionalized nanoparticles [122], while for the determination of Cd, Co, and Cu, an SPE with ligand-functionalized silica gel was reported [123]. The original attempt at the use of flame-AAS detection is the indirect determination of sulfite, based on the on-line reduction of MnO 2 and the measurement of quantitatively produced Mn(II) [124].…”

An ion imprinted magnetic organosilica nanocomposite for the selective determination of traces of Cd(ii) in a minicolumn flow-through preconcentration system coupled with graphite furnace atomic absorption spectroscopy

“…These are a more environmentally friendly alternative due to their simplicity, low cost, reduced sample and time consumption, increased sampling productivity, high sensitivity and selectivity. [30][31][32][33] In this regard our group has been devoted to studying SPE in ow-through systems holding an MC with ller materials (with and without II) in the last few years. 34,35 In this sense, different arrangements of ow systems using magnetic ller materials immobilized by the action of a permanent magnetic eld have been sporadically reported in the literature.…”

“…Problems related to material bleeding or need for reloading between measurements discourage this approach. 30,[36][37][38][39][40] In this work we propose for the rst time the use of magnetic materials with ion imprinting as ller materials of an MC held in a ow-through system for the preconcentration of Cd(II) followed by an optimized release and determination by GFAAS.…”