ThisPaperreportsenrichmentandsepqrationoftracePd(Ⅱ)withsilicagelbondedby(benzolyazo-arsenazoI)-aminopropyl(BAAI·SG).BAAI·SGisstableinsolutionbetween6mol/LHClandpH9.0.ThemaximumadsorptivecapacitiesofBAAI·SGandSGare52.7,23.5μmol/grespectively.AfterpreconcentrationthroughBAII·SGcolumn,Pd(Ⅱ)ofppblevelinartificialwatersamplescanbemeasuredbyspectrophotometry.