Determination of the Iron in Iron-calcium Cored Wire by Potassium Dichromate Titration Method
WU Ziliang
LI Shujin
SU Jiaxin
YIN Ruixia
QI Lixia
Abstract：The calcium particles in iron-calcium cored wire sample were dissolved by dilute acetic acid and the reduced iron powder in the sample was dissolved further by hydrochloric acid. In the hot hydrochloric acid medium, the most Fe3+was reduced to Fe2+by SnCl2, and then the residual Fe3+was reduced quantitatively by TiCl3, with sodium tungstate as indicator for reducing end. In the presence of sulfuric acid and phosphoric acid, making sodium diphenylamine sulfonate as indicator, the iron content was titrated by potassium dichromate standard solution. The satisfactory results were obtained and the relative standard deviation is less than 0.207 1%(n=6).
Keywords：iron-calcium cored wireironpotassium dichromate titration method
Publication Date：2013-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：2( 44-45 )