A new method for absolute analysis in <u>E</u>lectro<u>t</u>hermal <u>A</u>tomization <u>A</u>tomic <u>A</u>bsorption <u>S</u>pectroscopy (ETA-AAS), proposed for aqueous solutions, is extended to matrix modifiers based on palladium and magnesium. The experimental results show that only the Pd-based matrix modifier can be accepted for Pb analysis. No differences have been found if tantalum is used instead of graphite as the atomization surface in the same experimental conditions.

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