The operating characteristics of a dual nebulization system were studied including instrumental and chemical conditions for the hydride generation and analytical figures of merit for both, hydride and non hydride forming elements. Analytical performance of the nebulization system was characterized by detection limits from 0.002 to 0.0026 µg mL-1 for the hydride forming elements and between 0.0034 and 0.0121 µg mL-1 for the non-hydride forming elements, relative standard deviation for 10 replicate measurements at 0.25 mg L-1 level and recovery percentages between 97 and 103%. The feasibiity of the system was demonstrated in the simultaneous determination of Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Zn, As, Bi, Sb, Se, and Te in the NIST 1549 (non-fat milk powder), NIST 1570a (spinach leaves), DORM-2 (dogfish muscle) and TORT-2 (lobster hepatopancreas) certified samples for trace elements. Results found were in good agreement with the certified ones.
hydride; non-hydride elements; simultaneous determination; online hydride generation; ICP OES
