Chelex-100树脂分离-原子吸收法测定养殖用海水中的铜

摘要

Separation method using Chelex-100 chelating resin and GFAAS determination of copper in seawater for culture was eatablished. This method could solve the problem of interference on the determination of copper from sodium chloride matrix. Kd value of Na and Cu on chelating resin was detected. The influence of pH value of solution on adsorption and behavior of ion on resin were analyzed. Elution curve for Na and Cu was drawn. Adsorption capacity of resin was detected. Recovery of method:94%-102%, RSD:1.5%-4.2%.%对Chelex-100树脂对铜和钠的吸附系数Kd进行了测定，研究pH对吸附效果的影响，分析铜和钠的柱行为，并绘制了淋洗曲线，测定Chelex-100树脂对铅、镉、铜的吸附容量。使用自制小型离子交换柱，建立Chelex-100树脂分离-石墨炉原子吸收法测定养殖用海水中铜的方法，成功将铜与氯化钠基体分离，消除了基体干扰。方法回收率：94%～102%， RSD：1.5%～4.2%。