Iminodiacetic acid functionalized magnetic nanoparticles for speciation of Cr(iii) and Cr(vi) followed by graphite furnace atomic absorption spectrometry detection

Abstract

In this work, iminodiacetic acid (IDA) functionalized magnetic nanoparticles (Fe3O4@SiO2@IDA) were prepared and the adsorption behavior of Cr(iii)/(vi) on them was investigated.

Preparation of polymethacrylate monolith modified with cysteine for the determination of Cr(iii) ions

“…35 Furthermore, -SH, -NH 2 , and -COOH functional groups could coordinate with Cr(III) ions through nitrogen atoms, sulfur atoms, and oxygen atoms of L-cys@poly(GMA-MAA-EDMA) monolith. 1 A comparison of the developed method with other reported methods for Cr(III) ions were summarized in Table 4. Although it could not provide the best LOD level, the PMME-ICP-AES method can offer several other advantages, including that it does not require any expensive instruments and complex preparation steps and the operation is much easier.…”

“…Cr(III) has long been considered a benecial micronutrient for human health, being involved in glucose, insulin and protein metabolism. [1][2][3] Due to these properties, Cr(III) is widely used in dietary supplements marketed to reduce fat mass and increase lean body mass. 4 A trace level of Cr(III) is regarded as an essential nutrient, and high concentrations of Cr(III) can bind to DNA, which has a detrimental effect on cellular structures and damages cellular components as well as leading to sterility, lethal mutations and cancer in experimentation animals.…”

“…Numerous analytical techniques including inductively coupled plasma-atomic emission spectrometry (ICP-AES), 4,[6][7][8] ame atomic absorption spectrometry (FAAS), 1,9,10 inductively coupled plasma-mass spectrometry (ICP-MS), 11,12 ultraviolet visible absorption spectrometry (UV-vis), 13 high performance liquid phase chromatography (HPLC), 14 gas chromatography (GC), 15,16 inductively coupled plasma optical emission spectrometry (ICP-OES), 17 spectrouorimetry spectrophotometry, 18 and total reection X-ray spectrometry (TXRF) 19 have been reported for Cr determination. In spite of the advancement in modern analytical instruments, complications exist with direct determination of analytes at trace and ultra-trace levels.…”

“…13,20 Therefore, an ideal separation/preconcentration step prior to analysis is usually necessary compared to classical time consuming approaches which utilize large volumes of solvents and offer unsatisfactory recoveries. 21 In order to obtain higher selectivity and sensitivity, the above-mentioned analytical techniques have been coupled with extraction and preconcentration methods such as liquidliquid extraction (LLE), 13,22,23 solid-phase extraction (SPE), 1,4,24 solid phase microextraction (SPME), 15,25 magnetic solid phase extraction (MSPE), 19 cloud point extraction (CPE), 26,27 and electromembrane extraction (EE). 28,29 Although each procedure provides its own advantages, most of them suffer from different disadvantages such as large amounts of organic solvents, time consumption, tediousness or low enrichment factor.…”

Speciation of chromium in waters using dispersive micro-solid phase extraction with magnetic ferrite and graphite furnace atomic absorption spectrometry

“…Ferrite particles are suitable for the above purpose since they have excellent adsorptive characteristics, and their magnetic properties enable easy separation by a magnet. This methodology has been used for the separation of a number of metallic species [29][30][31] including the difficult case of chromium in waters [32][33][34][35] but, to the best of our knowledge, in all the analytical procedures reported to date, the ferrite particles are functionalized or mixed with other solid-phases to obtain nanocomposites with magnetic properties. Full benefit is not taken of the good adsorptive properties of the ferrite particles, which are merely used as a support to render the magnetic separation feasible.…”