摘要
对物理化学实验中所用Fe(OH)3胶体的制备及纯化方法等问题进行了详细、深入的探讨,介绍了该实验的测定方法和测定结果。以尿素络合水解法制取氢氧化铁胶体,采用透析袋对其纯化,选择与胶体相同电导率的氯化钾及盐酸混合溶液作辅助液,能较好地解决传统实验中过程学生操作烦琐、电动电势值测定不准确等问题。
The preparation and purification in the experiment of Fe（ OH）3colloid electrophoresis had been discussed in detail. This experimental determination method was introduced and the result as： iron hydroxide colloid was prepared with iron chloride and urea by the fast hydrolysis. Then,we used the dialysis bag to purify colloid. HCl ＋ KCl mixture solution with the same conductivity of colloid had been chosen. ζ- potential values were obtained accurately and repeatable,this method was simple and also suitable for students.
出处
《实验科学与技术》
2015年第1期21-24,66,共5页
Experiment Science and Technology
关键词
Fe(OH)3胶体
电泳
制备
纯化
电动电势
iron hydroxide colloid
electrophoresis
preparation
purification
ζ-potential
