Determination of selenium using atomically imprinted polymer (AIP) and hydride generation atomic absorption spectrometry

Atomic spectrometry update: Review of advances in the analysis of clinical and biological materials, foods and beverages

“…An atomically imprinted polymer synthesised from SeO 2 , 4-vinylpyridine and vinylimidazole was used in a minicolumn (5.4 cm  2.1 cm) for the preconcentration and determination of Se using FI-HG-FAAS. 23 An LOD of 53 ng L À1 was obtained which the authors claim to be the best currently reported. Interferents such as Cu 2+ and Cr 3+ were noted and therefore analysis by standard additions was recommended in their presence.…”

“…A second novel pre-concentration method for determination of Se was reported by de Lima et al 23 The pre-concentration medium was described as an atomically imprinted polymer (AIP), a development from molecularly-and ion-imprinted polymers, which are synthetic materials with recesses specically prepared to retain a molecule, ion or atom of interest. The polymer was prepared from 4 vinylpyridine, 1-vinylimidazole, ethylene glycol dimethacrylate and 2,2 0 -azobis-isobutyronitrile.…”

“…A very different approach for the measurement of Se in food matrices was taken by de Lima and co-workers. 23 The group produced polymers to specically concentrate Se on-line prior to measurement by HG-AAS. Under optimised conditions, the instrumental LOD and LOQ were 53 and 177 ng L À1 , respectively, which again is comparable to ICP-MS.…”

Atomic spectrometry updates: Review of advances in atomic spectrometry and related techniques

“…They achieved an LOD of <0.2 ng mL À1 using FAAS and selectivity of preconcentration in the presence of palladium and platinum. Another novel IIP has been reported by de Lima et al 12 who formed the polymer by reduction of Se IV to Se 0 prior to reaction with 4-vinylpyridine and vinylimidazole, hence they designated the product as an atom imprinted polymer (AIP). Preconcentration of Se was achieved in FI mode by rst reducing the analyte to Se 0 , using 0.5% (w/v) citric acid, then preconcentration on the AIP which was immobilised in a mini-column.…”

Determination of Se(iv) by adsorptive cathodic stripping voltammetry at a Bi/Hg film electrode

“…Different instrumental methods including UV-vis spectrophotometry, 3,4 kinetic spectrophotometry, 5,6 optical emission spectrometry (OES) 7 and atomic absorption spectrometry (AAS) 8,9 are prevalently used for selenium determination.…”