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ANALYSIS OF THALLIUM IN SPRUCE NEEDLES USING SOLID SAMPLING-HIGH-RESOLUTION CONTINUUM SOURCE GFAAS
Authors: Bendakovská Lenka | Krejčová Anna | Resano Martín | Černohorský Tomáš
Year: 2016
Type of publication: ostatní - přednáška nebo poster
Page from-to: nestránkováno
Titles:
Language Name Abstract Keywords
eng ANALYSIS OF THALLIUM IN SPRUCE NEEDLES USING SOLID SAMPLING-HIGH-RESOLUTION CONTINUUM SOURCE GFAAS This work investigates the potential of high-resolution continuum source graphite furnace molecular absorption spectrometry for the direct determination of thallium in spruce needles, which could be interesting from the viewpoint of environmental. BCR-679 with a certified bromine content encompassing was analyzed in order to validate the developed method. 15 samples of needles from all the Czech Republic and 1 sample from Italy of spruce twigs were excised, dried in the laboratory and homogenised by a cryogenic mill in the liquid nitrogen (the final volume diameter was about 15 μm). The treated samples were used for solid analysis using a HR-CS-AAS instrument (ContrAA 700) with sampling accessory (SSA 600), which is commercially available from Analytik Jena AG (Jena, Germany). Pyrolytic graphite tubes and solid sampling graphite platforms were used in this work. It was dosed 10 µl of Pd(NO3)2 as a modifier and 1-2 mg of sample into the graphite platforms. For the HR-CS-ASS analysis the spectral line 276.786 nm was used (LODP was 0.001 µg.g-1), RSD for the method was 3.94 %. The found concentrations of Tl in spruce needles were ranged: 0.002-0.131 µg.g-1, RSD (0.87-3.36 %). The found concentration in BCR-679 was in ranged certified value: 0.003 ±0.0002 µg.g-1 (certified value: 0.003 ± 0.0003 µg.g-1), R = 98.9%. Overall, the propesed method seems to be suitable for the fast and simple control of these types of samples, circumventing the traditional problems associated with sample digestion (e.g., losses of volatile compounds). Thallium, Solid sampling; HR CS GFAAS

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