壳聚糖富集FAAS法测定水中痕量Cu(Ⅱ)  

FAAS DETERMINATION OF TRACE AMOUNTS OF Cu(Ⅱ) IN WATER AFTER ITS PRECONCENTRATION ON CHITOSAN

作　　者：李斌[1] 崔慧[1] 

机构地区：[1]聊城师范学院化学系,聊城252059

出　　处：《理化检验（化学分册）》2001年第6期253-254,260,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了以壳聚糖作富集柱 ,稀H2 SO4 为洗脱剂 ,稀NaOH为再生剂 ,火焰原子吸收光谱法简便、快速分离富集测定水中痕量Cu(Ⅱ )的方法 ,于波长 32 5nm处测定 ,检出限为 2 0ng·ml- 1,线性范围为 10～ 2 0 μg·ml-Trace amounts of Cu(Ⅱ) in water is preconcentrated by adsorption on a chitosan column from a slightly acidic medium of pH 5.0 and at a flow rate of 4ml·min -1 . It is then eluted from the chitosan column with 4ml of 1mol·L -1 H 2SO 4, and the eluted solution is diluted to 25ml in a volumetric flask. The copper is finally determined by FAAS method. The chitosan column should be reclaimed after every analysis by washing with distilled water and 2.5mol·L -1 NaOH solution successively at a flow rate of 1ml·min -1 , and wash again with water to remove the alkaline solution until the eluted solution is neutral.

关 键 词：火焰原子吸收光谱法 壳聚糖 富集 铜 水 痕量 分析 

分 类 号：O661.1[理学—分析化学] O614.121[理学—化学]