Fe(Ⅲ)、Fe(Ⅱ)单点快速分析

Single-Point Titration of Ferrous and Ferric

本文研究了 Fe(Ⅲ)、Fe(Ⅱ)共存体系的单点快速分析法,导出了定量关系式。Fe(Ⅲ)、Fe(Ⅱ)的浓度范围为 1.000×10^(-2)mol·L^(-1)至 5.0×10^(-4)mol·L^(-1),当各自的浓度在 5.0×10^(-4)mol·L^(-1)以上、1.0×10^(-3)mol·L^(-1)下时,相对偏差小于 0.5％。当浓度低至 1.0×10^(-4)mol·L^(-1),相对偏差小于1.5％。在以上浓度范围内,Fe(Ⅲ)与Fe(Ⅱ)变动时,都有高的精密度,且准确度好。

The study of Single--Point titration of Ferrous and Ferric is presented in this paper. Therange of concentration and relative standard deviation of Ferrous and Ferric are listed as thefollowings: One is over 5. 00×10-3M with its relative standard deviation less than 0. 1%, theother, between 5. 00×10-4M and 1. 00×10-3 M, less than 0. 5%, and the third down to 1. 00×10-4 M, less than 1. 5%. The concentration of Ferrous and Ferric varies from 1×10-4 M to1. 00×10-2 M with a satisfactory accuracy and precision.