Determination of trace amounts of germanium by flow injection hydride generation atomic fluorescence spectrometry with on-line coprecipitation.
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.
Jianbo
Shi
S
Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan, Hubei 430074, People's Republic of China.
Zhiyong
Tang
T
Chunhua
Tan
T
Quan
Chi
C
Zexiang
Jin
J