Selective Determination of Hafnium with Solid Surface Room Temperature Phosphorescence Optosensing

Abstract

An optosensing method for selective determination of hafnium has be developed. It is based on the phenomenon that when the complex formed by 8-hydroxy-5-quinolinesulfonic acid with hafnium is absorbed on the strongly basic anion exchange resin, the phosphor can produce room temperature phosphora-scence (RTP) in aqueous medium. The hafnium can be determined selectively in the presence of zirconium. The RTP intensity is linear up to 4×10^-5 M of hafnium, the detection limit is found to be 5×10^-8 M of hafnium.

Key Words:

• Hafnium
• room temperature phosphorimetry
• optosensing