【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50 mL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Cu进行分析,均得到满意结果.更多还原

【Abstract】 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 Amberlite XAD-2 functionalized with dithizone（H₂D_Z）copolymer resin（XAD-H₂D_Z）.Then in the laboratory,these minicolumns were determined by flow injectionflame 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.更多还原