Determination of ferrous iron in cement sample- A colorimetric study

A simple, rapid and sensitive spectrophotometric method was developed for the determination of trace amounts of iron using as a chromogenic reagent. The proposed method was based on the reaction of iron with ammonium thiocyanate forming a complex having a maximum absorption at 450 nm. Iron was estimated colorimetrically , the results were found to be reproducible and the method was economical and less time consuming. The method was successfully applied to cement sample and results were found to be accurate and precise as the more sophisticated colorimeter was commonly used for ferrous determination.