Jianbo Shi, Zhiyong Tang, Chunhua Tan, Quan Chi, Zexiang Jin
Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan, Hubei 430074, People's Republic of China.
Talanta. 2002 Mar 11;56(4):711-6. doi: 10.1016/s0039-9140(01)00617-8.
A method for the determination of trace amounts of germanium by hydride generation atomic fluorescence spectrometry (HG-AFS) associated on-line with flow injection (FI) coprecipitation preconcentration was described. The samples, each spiked with Ni(2+) (500 mugml(-1)), were introduced into the FI system using time-based injection, and mixed with a NaOH solution (50 gl(-1)). Germanium was preconcentrated by coprecipitation with the generated nickel hydroxide precipitate. The precipitate is subsequently eluted with 20% (v/v) phosphate acid solution and directed into the HG-AFS system. This method is simple and rapid. The detection limit (3sigma) was 0.11 mugl(-1) and the relative standard deviation was 5.6% (n=11) at the 10 mugl(-1) level.
描述了一种通过与流动注射（FI）共沉淀预富集在线联用的氢化物发生原子荧光光谱法（HG-AFS）测定痕量锗的方法。将每份加入Ni(2+)（500μg ml(-1)）的样品采用定时进样方式引入FI系统，并与NaOH溶液（50 g l(-1)）混合。锗通过与生成的氢氧化镍沉淀共沉淀进行预富集。随后沉淀用20%（v/v）磷酸溶液洗脱并导入HG-AFS系统。该方法简单快速。在10μg l(-1)水平下，检测限（3σ）为0.11μg l(-1)，相对标准偏差为5.6%（n = 11）。
