手控注射分离器分离富集火焰原子吸收测定蔬菜中的铅  

FAAS Determination of Lead(Ⅱ) Separated and Concentrated Using a Manual-controlled Injection Separator

作　　者：谢发之[1] 谢增鸿[1] 叶芳贵[1] 

机构地区：[1]福州大学化学化工学院化学系,福州350002

出　　处：《应用化学》2004年第12期1273-1276,共4页Chinese Journal of Applied Chemistry

基　　金："十五"国家重大科技专项 ( 2 0 0 1BA80 4A2 6);福建省重大科技项目 ( 2 0 0 3Y0 0 5 );福建重大攻关项目 ( 2 0 0 2Y0 5 1);福建省自然科学基金(D0 3 10 0 10 )

摘　　要：设计了一种手动控制进样速度的快速分离富集Pb2 + 离子的分离器 ,分离器由 5mL一次性注射器、接口和微分离富集柱组成。微柱填充以巯基葡聚糖凝胶来分离富集Pb2 + 离子时 ,5mL样品溶液 (pH =3 30 ) 30s左右注射过柱 ,5mL 2mol/L的HCl溶液以相同的流速注射洗脱 ,铅的平均回收率可以达到 96 95 % ,RSD =3 33% (n =2 2 ) ,预富集因子约为 2 0 0 ,可以实现大体积样品溶液中痕量Pb2 +A 5 mL disposable separator syringe, a connector and a micro-column is fabricated for the separation and concentration of Pb 2+ for its subsquent FAAS determination. The flow rates of samples could be controlled manually by a disposable syringe. A 5 mL of sample solution(pH=3.30) is injected through the micro-column filled with SDG in about 30 seconds and the adsorbed Pb 2+ is eluted by 5 mL of 2 mol/L HCl in the same flow rate. The average recovery of Pb 2+ is up to 96.95%, RSD is 3.33%(n=22)and pre-concentration factor is 200 for Pb. It can be applied to the separation and concentration of a large volume of sample solution containing trace amounts of Pb 2+.

关 键 词：分离器  分离富集  铅 

分 类 号：O652.6[理学—分析化学]