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1引言 近20年来,国内外作了许多用泡沫塑料对金属离子进行富集与分离的研究．对分析而言,性能最好的是聚氢基甲酸酯泡沫塑料(
1 Introduction In the recent 20 years, many researches have been done on the enrichment and separation of metal ions by foam plastics at home and abroad. For analysis, the best performing materials are polyurethanes (