Experimental Improvement on Determination of Total Iron Content by Potassium Dichromate Method
DENG Wen-Fang1,2, LI Hai1, MA Ming1, CHEN Chao1, ZHU Xiao-Hua1, HUANG Si1, FANG Zheng-Fa1**
1. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China; 2. National Demonstration Center for Experimental Chemistry and Chemical Engineering Education, Hunan Normal University, Changsha 410081, China
Abstract In this paper, the deficiencies in the experiment of determining total iron content by potassium dichromate titration are improved, and a mercury-free iron determination method based on SnCl2-I2-AgCl pretreatment is explored. The improved experiment involves major knowledge of the four chemical equilibrium theories. The method has better reproducibility, environmental friendliness, low cost, and has achieved good teaching results.
DENG Wen-Fang, LI Hai, MA Ming, CHEN Chao, ZHU Xiao-Hua, HUANG Si, FANG Zheng-Fa. Experimental Improvement on Determination of Total Iron Content by Potassium Dichromate Method[J]. Chinese Journal of Chemical Education, 2023, 44(22): 52-56.
