[1] 高鸿. 分析化学前沿 [M]. 北京:科学出版社 1991. [2] Fang Z, PZUZICKA J, HANSEN E H. An efficient flow-injection system wit on-line ion-exchange preconcenoration for the decermination of trace amounts of heavy metals by atomic absorption spectrometry [J]. Analytical Biochemistry 1984, 164.