UV-photolysis assisted digestion of food samples for the determination of selenium by electrothermal atomic absorption spectrometry (ETAAS)

Speciation of Organic and Inorganic Selenium in Selenium-enriched Eggs by Hydride Generation Atomic Fluorescence Spectrometry

“…The method LOD of 0.7 μg kg −1 was achieved for 1 g sample and 10 mL final solution. The sensitivity of the proposed method is higher than the spectrophotometric method (Feng et al 1998), the atomic spectrometric methods (Xu 2007;Türker and Erol 2009;Manjusha et al 2007;Ieggli et al 2009;Li et al 2008;Gao et al 2006). The observed relative standard deviation (RSD) value for 11 replicate analyses at 0.5 μg L −1 was 1.4%.…”

“…A series of techniques were reported for the determination of total Se in eggs, such as spectrophotometry (Feng et al 1998), spectrofluorometry (Golubkina andPapazyan 2006;Veiga et al 2008), room temperature phosphorescence (Liu et al 2007), and atomic spectrometry (Xu 2007;Pappas et al 2006;Türker and Erol 2009;Manjusha et al 2007;Ieggli et al 2009;Chen and Marshall 1999;Xu et al 2002). It was found that Se content in yolks was far higher than that in albumen (Nisianakis et al 2009).…”

Trace determination and chemical speciation of selenium in environmental water samples using catalytic kinetic spectrophotometric method

“…Selenium is one of the most interesting elements from the point of view of its clinical and environmental effects because it has the narrowest tolerance window of any element [1]. Depending on the species, oxidation state and concentration, Se compounds can range from being essential to highly hazardous and toxic [2].…”

Concentrations of selenium, barium, and radium in Brazil nuts

“…While Brazil nuts (Bertholletia excelsa, family Lecythidaceae) have been known (Barclay et al, 1995;Chang et al, 1995) to contain a high amount of Se, more recent studies (Manjusha et al, 2007;Dumont et al, 2006;Kannamkumarath et al, 2002) have examined the distribution of Se species among different fractions (e.g. proteins) of the nut.…”