2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101437This paper has been withdrawn by the author because of copyright reasons.This paper has been withdrawnAtomic PhysicsInstrumentation and DetectorsElectrothermal vaporization with axially focusing convection upstream: effects of graphite furnace carbon and K/Pd modifiers on analyte transporttext