Electrothermal atomic absorption determination of antimony and arsenic after preconcentration by solid-phase extraction

A procedure for determining antimony and arsenic in-fresh water, plants, an d common salt was developed. The procedure is based on the selective precon centration of Sb(III) and As(III) dipropyl dithiophosphates from chloride s olutions by solid-phase extraction using DIAPAK-C16 cartridges. It is shown that microcolumns with this sorbent can be used for flow preconcentrating antimony and arsenic. Antimony and arsenic are determined in the eluate by electrothermal atomic absorption spectrometry. The relative standard deviat ion in the determination of antimony and arsenic at the level of 10(-6) to 10(-4)% is 3-7%.