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本文对二甲酚橙(xo)螯合形成纤维分离富集水中Cu、Co、Ni、Pb的性能进行了描述。VS-2型阴离子交换纤维在pH=6.0条件下能负载金属离子和XO的螯合物。实验表明:这种螯合形成纤维能预富集水中ppb级金属元素,回收率可达95％以上。这种螯合形成纤维有交换速度快,容易洗脱和容易再生的特点,并且一个交换柱(0.8×8cm)可以通过较大体积的溶液(3000ml)。此方法测定水中Cu、Co、Ni、Pb的精密度分别为1.54％、0.86％、3.06％、4.52％。
In this paper, the properties of xylenol (xo) chelating to form fibers for the separation and enrichment of Cu, Co, Ni and Pb in water were described. VS-2 anion exchange fibers can chelate metal ions and XO at pH = 6.0. Experiments show that: this chelating fiber can pre-enrich water ppb level of metal elements, the recovery rate of up to 95%. This chelate-forming fiber has the characteristics of fast exchange, easy elution and easy regeneration, and an exchange column (0.8 x 8 cm) can pass a larger volume of solution (3000 ml). The precision of this method for the determination of Cu, Co, Ni and Pb in water was 1.54%, 0.86%, 3.06% and 4.52%, respectively.