填充玻璃纤维滤膜基钛酸锶钡的手控注射式富集器对水中锌的富集性能

以多孔玻璃纤维滤膜基钛酸锶钡（BBST）为吸附材料,制备了手控注射式富集器;考察了该富集器对水中Zn2＋的吸附富集性能.结果表明：当介质的pH值为3-7时,多孔玻璃纤维滤膜基钛酸锶钡对水中的Zn2＋具有很强吸附能力,其静态吸附容量为24.30 mg/g;制备的富集器可实现对Zn2＋的动态吸附,被吸附的Zn2＋可用2.0%的EDTA溶液动态洗脱回收,其浓集因子可达500.提出了手控注射式钛酸锶钡富集器富集,火焰原子吸收光谱法测定水中痕量Zn2＋的新方法.方法检出限为0.09μg/L.应用于一次蒸馏水和纯净水中痕量Zn2＋的富集,用火焰原子吸收法测定,回收率为93.0%-102.0%.

Pre-concentration Capability for Zinc in Water with Manual-controlled Injection Barium-strontium Titanate Based on Glass Fiber Filter Enricher

By using porous barium-strontium titanate based on glass fiber filter（BBST） as sorbent,a new manual-controlled injection separator was prepared,and the concentrative potential of the manual-controlled injection enricher for zinc ion was investigated.The results showed that the porous BBST had adsorption capacity towards the zinc ion when the pH value ranges between 3-7.The adsorption capacity of porous BBST for zinc ion was found to be 24.30 mg·g-1.Packed with porous BBST,the micro-column had been joined together injector.The manual-controlled injection separator could adsorb for zinc ion in flowing.The zinc iron could be completely eluted by using 2.0% EDTA.The zinc iron was concentrated successfully,and the pre-concentration factor was 500.A new method for determination of trace zinc ion in water based on the manual-controlled injection enricher and FAAS determination were proposed.The detection limit of this method for zinc was 0.09 μg·L-1.The method has been applied to the determination of trace zinc ion in distilled water and pure water,the recoveries were 93.0%-102.0%.