微型柱现场在线采样技术测定海水中痕量铜  

Determination of trace copper in seawater by minicolumn field sampling technique

作　　者：吴冬梅[1] 王爱霞[1] 郭黎平[1] 

机构地区：[1]东北师范大学化学学院,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2006年第1期80-83,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50473032)

摘　　要：在海水（pH7．8-8．5）条件下，使用微型柱现场在线采样（MFS）技术直接对海水中痕量铜进行预富集，然后在实验室中采用流动注射-火焰原子吸收（FI—FAAS）联用系统成功地实现了对海水中铜的测定．当采样体积为50mL时，其富集因子为432，检出限为0．019μg／L，相对标准偏差为1．68％．对海水中微量元素标准物质GBW（E）080040和大连老虎滩区域海水中的（沁进行分析，均得到满意结果．Cu in seawater samples were collected and pre- concentrated in site by on - line minicolumn field sampling（MFS） technique under the acidity of seawater, the adsorption materials of the column used for the first was Amherlite XAD- 2 functionalized with dithizone（H2Dz）copolymer resin （XAD- H2Dz）. Then in the laboratory, these minicolumns were determined by flow injection - flame atomic absorption spectrometry （FI - FAAS）. The enrichment factor of 432 was obtained for 50 mL of sampling volumes, and the detection limit was 0. 019 μg/L and relative standard deviation （5 μg/L, n = 11） was 1.68% at the same conditions. The method was successfully applied to the determination of copper in a certified reference materials （GBW （E）080040） and in seawater samples from Dalian Laohutan, respectively, and the results was satisfactory.

关 键 词：微型柱现场在线采样技术 Amberlite XAD-2键合双硫腙 流动注射-火焰原子吸收 铜 海水 

分 类 号：O657[理学—分析化学]