“…There are many reports on mercury vapor absorption on gold-, [64][65][66] platinum-, 67,68 palladium- 69 or iridium-coated 63,70,71 graphite tubes and absorption of hydrides on carbide-forming elements (Zr, Nb, Ta and W) [72][73][74][75] or noble metals (Pt, Pd, Ir or Pd/Ir). [73][74][75][76][77][78][79][80][81][82][83][84][85][86] On-line matrix separation/digestion followed by ETAAS detection ETAAS has very low detection limits for many elements in aqueous solutions, but it is very sensitive to matrix interferences even with sophisticated background correction and chemical modification. Therefore, removal (solvent or sorbent extraction) or digestion (MW) of the residual sample matrix, as well as isolation of the analyte-containing compounds (e.g., hydride formation, coprecipitation, LC separation), is preferred.…”