MBM新型螯合纤维素富集原子吸收测定痕量铅、镉、铜和镍

AAS DETERMINATION OF TRACE LEAD,CADMIUM,COPPER AND NICKEL BY ENRICHMENT WITH 2 MERCAPTOBENZIMIDAZOLE CHELATING CELLULOSE

螯合纤维素制备工艺简单，性能优越，成本低廉。本文运用间接醚化法将优良的重金属螯合剂２－巯基苯并咪唑接枝于棉纤维上，合成了２－巯基苯并咪唑新型螯合纤维素（ＣＣ－ＭＢＭ），通过选择最佳条件，达到了在一个水样中同时富集和洗脱铅、镉、铜、镍。结果表明，ＣＣ－ＭＢＭ用于痕量元素的分离富集具有交换速度快易于解脱，富集倍数大，选择性好等优点。

Chelating cellulose is of simple preparation,excellent nature and low cost.MBM chelating cellulose was prepared with good chelating reagent (2 mercaptobenzimidazole)grafted on cotton by indirect etherification method.Four heavy metal ions in one solution can be simultaneously preconcentrated and eluted under good condition.Results have shown that the approach for separating and preconcentrating trace of Cu,Pb,Cd and Ni has advantages of high exchanging speed,high preconcentration multiple,high selectivity,easy elution and excellent results.