A highly selective direct colorimetric procedure for the determination of zirconium in steel with arsenazo III by using a pressure-digestion technique for sample dissolution

Abstract

Zirconium in steel is determined colorimetrically with arsenazo I11 in 7.5 M perchloric acid solution. Chemically inert forms of zirconium, which remain unchanged after conventional treatment with acid, are dissolved by means of a pressure-digestion technique. Results obtained with six British Chemical Standard steel samples show excellent precision and accuracy. Interference studies with fifteen metals commonly found in steel indicate that the procedure is applicable to a wide range of steels. Concentrations of zirconium in excess of 0.001 per cent. nz/m in steel samples can be determined.

Radiochemical Neutron Activation Analysis for Trace Chlorine in Steels and Alloys

“…There are few other analytical techniques capable of measuring Cl in materials such as stainless steel at levels below 1 mg/kg. In general, techniques involving dissolution processes use a strong attack for stainless steel, , perhaps involving heat where losses of volatile halides may occur. In addition, any reagents used in the dissolution and separation process are potential sources of contamination.…”

Ferrous metallurgy

“…ZIRCONIUM Spectrophotometric. Arsenazo III has been applied to the determination of zirconium in steels (both low and high alloy) without separation (33,66,189) and with a preliminary extraction before analysis (95). Picramine-epsilon has been used for zirconium analysis in ferrotitanium, steels, and slags (149).…”