Vilpan, Yury A.Grinshtein, I. L.Akatov, A. A.2021-06-302021-06-302005-01Vilpan, Y. A. vd. (2005). "Direct atomic absorption determination of mercury in drinking water and urine using a two-step electrothermal atomizer". Journal of Analytical Chemistry, 60(1), 38-44.1061-9348https://doi.org/10.1007/s10809-005-0045-6https://link.springer.com/article/10.1007/s10809-005-0045-6http://hdl.handle.net/11452/20926A new method was developed for the direct electrothermal atomic absorption determination of mercury in drinking water and urine using double vaporization in a two-step atomizer with a purged vaporizer. In this method, a sample is placed in the vaporizer of a two-step atomizer, dried, and vaporized. The sample vapor is transferred to an unheated atomizer cell with a flow of argon and trapped by the inner surface of cell walls. This procedure can be performed repeatedly to preconcentrate mercury in the atomizer cell. Next, a portion of the sample transferred to the inner surface of the atomizer cell is revaporized and atomized by heating the atomizer cell of the two-step atomizer with a purged vaporizer, and the atomic absorption of mercury is measured. It was found that the degree of mercury transfer and trapping is as high as 100% at sufficiently high temperatures of primary vaporization, regardless of the material of the inner surface of the atomizer cell. The detection limits for mercury were 0.24 or 0.024 mug/L for drinking water at a sample volume of 100 muL using a single sample transfer or the procedure repeated ten times, respectively, and 2.0 mug/L for urine at a sample volume of 20 muL and a single sample transfer. The accuracy of the results was confirmed by the analysis of certified mercury samples and samples with known additives.eninfo:eu-repo/semantics/closedAccessSpectrometryLeadCadmiumChemistryArticle0002269113000092-s2.0-149443482463844601Chemistry, analytical