[Separation and preconcentration by extraction and anti-extraction-determination of trace Te in complex geological samples by hydride generation atomic fluorescence spectrometry].
A method for the determination of trace Te in the complex geological samples by hydride generation atomic fluorescence spectrometry using MIBK as extraction reagent was developed. The extraction ability of Te (IV) in the HCl-NaBr-MIBK system and the anti-extraction behavior of Te (IV) in the HCl-KMnO4-MIBK system were studied. Under the optimum extraction condition of 3.6 mol x L(-1) HCl-100 g x L(-1) NaBr, Te (IV) was extracted completely by MIBK, Te (IV) in the MIBK phase was oxidized to Te (VI) with HCl-KMnO4, Te (VI) in the MIBK phase was anti-extracted using water, then the interference elements such as Au, Ag, Pt, Pd, Cu, Pb, Co, Ni, Cd, As, Sb, Bi, Hg, Tl and Se for the determination of Te by hydride generation atomic fluorescence spectrometry were eliminated successfully. The detection limit of Te was 1.14 x 10(-4) microg(-1), and the relative standard deviations of Te was 6.84%. The method was applied to complicated geological samples.
Xiao
Fan
F
Geoanalytical Laboratory of Hebei, Baoding 071051, China. xfan62@vip.sina.com
Liu
Jin-wei
JW
Wang
Yong-qing
YQ
Liu
Qing-xue
QX
Li
Na
N
Meng
Zhi-xin
ZX