Determination of Beryllium in Solid Samples by Flame Atomic Absorption Spectrometry after Preconcentration on Activated Carbon

Abstract

It is generally supposed that the preconcentration procedure is used for the determination of metal concentrations under the sensitivity of the measurement method. This study showed that preconcentration is also need for the beryllium (Be) concentration over the sensitivity of atomic absorption spectrometry. For this purpose, a simple and selective method for the determination of Be in solid samples is modified. The method is based on the preconcentration of the complexes of beryllium-acetylacetone plus morin, oxine, PAN and PAR on activated carbon at different pH values. The adsorbed beryllium was eluted with aqua regia and measured by flame atomic absorption spectrometry (FAAS). Recoveries of up to 85% were achieved. For removing chemical interferences and applying the method to Be determination in solid samples, the masking studies and reproducibility were examined. The detection limit was found to be 0.12 ng mL -1 . The relative sandard deviations (RSD) were found to be 8% for 60 mL of 10.0 ng mL -1 using 10 replicate enrichment procedures. Beryllium concentrations in the studied solid samples were found in the range of 0.28 -3.95 mg kg -1 .

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

“…Yaman and Avci 50,51 pre-concentrated Be in the form of Beacetylacetone plus morin, oxine, PAN and PAR on activated carbon at different pH values. Recoveries of up to 85% were achieved following elution with aqua regia.…”

Determination of nickel and cobalt in reference plant materials by carbon slurry sampling GFAAS technique after their simultaneous preconcentration onto modified activated carbon

“…However, the most effective method for separation and enrichment of trace metals from aqueous solutions seems to be adsorption of heavy metals onto activated carbons because of their large surface area, high adsorption capacity, micro-pore character and high degree of surface reactivity (Dobrowolski, achieved simply by adjusting pH to the appropriate value or by application of a chelating agent (Camel, 2003). In the case of nickel and cobalt enrichment on activated carbon, this is done after chelating with: pyrocatechol violet (Narin et al, 2000), 8-hydroxyquinoline (Shiowatana et al, 2000), 4-(2 pyridylazo) resorcinol (Chakrapani et al, 1998), cupferron (Yaman and Gucer, 1998), 1,10-phenanthroline (Mikuła and Puzio, 2007), diethyldithiocarbamate (Kilicel and Gokalp, 2005), ammonium pyrrolidinedithiocarbamate (Soylak et al, 1996), dithioxamide (Ghaedi et al, 2007a), or N,N 0 -ethylenebis (ethane sulfonamide) (Karacan and Aslantas, 2008). The disadvantage of these procedures is that they require series of complexation steps (Daorattanachai et al, 2005).…”

Rapid determination of some trace metals in several oils and fats

“…Allen et al, (Allens et al, 1998) reported plasma and furnace atomic spectroscopies in which an atomic pressure microwave digestion procedure is described for the determination of copper, lead and nickel in edible oils. Another method proposed by Yaman et al, (Yaman et al, 1998), involved the determination of nickel in vegetable matrixes by AAS, after pre-concentration on activated carbon. Among the simpler atomic absorption spectroscopic methods requiring minimal manipulation and lowest probability of sample contamination, solubilizing and extraction of total trace metals from oil matrixes have also been used over the years (Flider et al, 1981;Persmers et al, 1971).…”