Determination of the TFe in Composite Carbon Iron Alloy by Burning Carbon Removal and Potassium Dichromate Titration Method
FU Shigang
MA Qingwen
WANG Junxiu
WANG Yanqin
LI Longxia
Abstract：After being burned at 760℃selected by test for removing free carbon in carbon iron alloy, the sample was dissolved by the mixture solution of sulfuric acid and phosphoric acid. Adding hydrochloric acid, the most Fe3+was reduced to Fe2+by SnCl2, and then the residual Fe3+was reduced quantitatively by TiCl3, at the same time, sodium tungstate was used to indicate the reducing end. With sodium diphenylamine sulfonate as indicator, the TFe content was titrated by potassium dichromate standard solution. The satisfactory results were obtained and the relative standard deviation≤0.21%(n=6).
Keywords：carbon iron alloyTFeburning carbon removalpotassium 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：3( 42-43,46 )