泡沫塑料富集法在痕量元素分析中的应用

Application of foamed plastics enriching in the trace elements analysis

研究了负载５－Ｂｒ－ＰＡＤＡＰ－苯聚氨酯泡沫塑料富集火焰原子吸收测定钻的方法。实验结果表明，此法在ｐＨ为７．１６～７．３之间可定量吸附钴，平衡时间约２０分钟，吸附量约４２０μｇ／ｇ、１０００倍的约２０种常见离子不干扰测定。检出限为０．０４μｇ／ｍｌ，方法简便、快速、灵敏。

The determination of Co using the loaded 5-Br-PADAP-benzenol polyurethane foamred plasties by cnriching flameatomic absorption spcctronctry has been studied.The experiment showed that the method could absorb co quantitively at a pH ofbetween 7,16 and 7.30,the balance time was 20 minutes and the absorptivc capacity was about 420μg/g. The detection limit was 0.04μg/ml,about 20kinds of common ions as l000 times as Co had no interference.The method was simple ,qukick and sensitive.