共 11 条
[11]
SELIG W, 1974, MIKROCHIM ACTA, P315
POTENTIOMETRIC TITRATIONS OF SELENIUM WITH A FLUORIDE-SELECTIVE ELECTRODE
被引：8
作者：
BERNAL, JL
BARRADO, E
PARDO, R
机构：
[1] Department of Analytical Chemistry, Faculty of Sciences, Prado de la Magdalena
关键词：
D O I：
10.1016/S0003-2670(01)93249-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ;
081704 ;
摘要：
Selenite can be determined with a fluoride-selective electrode by two methods: a direct procedure based on the joint titration of selenite and standard fluoride with lanthanum and an indirect method based on precipitation of selenite with excess of lanthanum followed by back-titration with fluoride. In the first case the end-point is located by the second derivative method, and in the second case by means of a Gran plot. Direct titrations are suitable for selenite concentrations above 5 mM; indirect titrations are useful for concentrations as low as 0.5 mM. © 1979.
引用
收藏
页码：71 / 77
页数：7
相关论文