Zhao Feng,Li Ruixian,Zhu Jianguo,Chai changxin,Zhang Qinghua

(Lanzhou test and quality supervision center for geological and mineral products, Ministry of land and resources. Lanzhou Gansu province .730050

Abstract: The sample was decomposed in nitric acid + hydrofluoric acid + perchloric acid + phosphoric acid until the white fume was emitted off. In the medium of phosphoric acid,the sample was directly determined by atomic fluorescence spectrometry without separation and preconcentration. The method has the advantage of simplicity、quickness and low cost. The method has been verified by the national standard reference materials to be accurate and reliable. The method is suitable for the determination of batch samples. The detection limit of the method is 0.072 µg/g with a precision (RSD%,n=8)of 4.5%.

Key word: atomic fluorescence spectrometry. direct determination. environment soil. Germanium 

Analysis and Testing Technology and Instruments, Vol. 17, No. 1, 2011, 56-58.