Institute for Color Science and Technology (ICST) Progress in Color, Colorants and Coatings 2008-2134 3 2 2010 12 09 Janus Green Dye as a New Reagent for Catalytic Kinetic Determination of Zirconium in Ceramic Materials 58 65 75773 10.30509/pccc.2010.75773 EN H. Bagheri Department of Chemistry, Islamic Azad University, Takestan Branch M. Saber-Tehrani Department of Chemistry, Islamic Azad University, Science and Research Branch M. R. Shishehbore Department of Chemistry, Islamic Azad University, Yazd Branch, M. Shahvazian Department of Textile Engineering, Islamic Azad University, Yazd Branch Journal Article 2010 10 26 A new catalytic kinetic spectrophotometric procedure for determination of trace quantities of zirconium was proposed. Janus Green was oxidized by potassium bromate and zirconium catalyst which then converted to a colorless product in acidic media. Reaction rate was monitored spectrophotometrically at 606 nm. It relies on the linear relationship between the absorbance difference (ΔAt) and Zr(IV) amounts in the range of 0.1-250 µg ml−1. Under optimum conditions, the sensitivity of the proposed method, i.e. the detection limit corresponding to 3 min is about 0.08 µg ml−1. The method is featured with good accuracy and reproducibility for zirconium(IV) determination in real samples. The method is simple, highly sensitive, selective and very stable. https://pccc.icrc.ac.ir/article_75773_eb49bcd9746d443d78b5215868661635.pdf