Manner preconcentration bismuth is based on generating bismutanu, trapping thereof in a conventional heated quartz atomizer, modified by the insertion of quartz capillary in the stem atomizer whose end reaches to the beginning of the atomizer optical tube, atomization and detection thereof by the AAS method. In the trapping step is a carrier gas containing generated hydride and hydrogen (generated by decomposition of tetrahydroborate) adding oxygen to the stoichiometric amount relative to the present hydrogen. At the end of the quartz capillary tube burns the flame in which hydrogen is burnt in excess of oxygen. Hydride is flame layout and analyte detected. After the finish of hydride generation by closing the oxygen supply and triggering prouduvodíku analyte abruptly released and atomized. Atomizer for carrying out this method is modifikovántak from the longitudinal axis of the stem (1), the atomizer is placed quartz capillary (4), an inside diameter of from 0.3 to 0.7 millimeters on reaching the beginning of the optical tube (2) atomizer.
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