Four crosslinked resins containing aza-or thio-azacrown ether structure were.synthesized by the reaction of chloromethylthiirane(MS)[or chloromethyloxirane(MO)]with triethylolamine(N)and diethyloldmine(NH) respectively in the presence of NaH using dioxane as solvent at the temperature of 50-80℃.The possible mechanism is that the monomer MS(or MO) is carried out anionic ring-opening polymerization bythe initiation of-O-Na+(or=N-Na+) to form linear polymer at first and then the further reaction of elimination of NaCl between the macromolecules and sodium salt of N(or NH)gives the crosslinked resin at last.The order of adsorption capacities of resins for noble metals is Au(Ⅲ)(2.5～4.4mmol/g)

Pd(Ⅱ)(1.3～2.9mmol/g)

Pt(Ⅳ)(0.56～0.76mmol/g).The adsorption capacities of resins containing S and N (MSN

MSNH)for Ag+are much higher (6.6～6.7mmol/g)than those of the resine containing N(1.0～2.5mmol/g).The adsorption percentages of MSN and MSNH for Au(Ⅲ)

Pd(Ⅱ)

Pt(Ⅳ)in low concentration(20～50μg/ml)are also higher (94～99%)than those of the resins of MON and MONH (10～92%) .