D. Tsalev, P. Mandjukov
Feb 1, 1987
Citations
0
Influential Citations
16
Citations
Journal
Microchemical Journal
Abstract
Abstract A two-step analytical method for the determination of hydride-forming elements is described. Nanogram amounts of antimony, arsenic, bismuth, selenium, tellurium, and tin are preconcentrated by generating and subsequent trapping of their hydrides into a small volume of absorbing solution containing 500 μg · ml −1 Ce(IV) as (NH 4 ) 2 Ce(NO 3 ) 6 and 500 μg · ml −1 iodide (as KI). Cerium serves as an efficient matrix modifier in electrothermal atomic absorption spectrometry. Limits of detection in the subnanogram per milliliter range are obtained in the determination of As and Se in mineral water and of As, Sb, and Bi in a certified soil sample. The technique could be applied to studying processes in hydride generation atomic absorption spectrometry as well as to the determination of other hydride-forming elements and species, and to the determination of mercury.