MBM新型螯合纤维素富集原子吸收测定痕量铅、镉、铜和镍

• 机 构: 四川师范学院化学系
• 出 处: 光谱学与光谱分析
• 发表日期: 1998年5期
• 关键词: CHELATING CELLULOSE SEPARATION AND PRECONCENTRATION AAS DETERMINATION

螯合纤维素制备工艺简单,性能优越,成本低廉.该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,样品测定结果令人满意“,”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,...