Reversed-Phase Column Extractive Separation of Gd(III) with Poly[dibenzo-18-crown-6]

Abstract

A poly[dibenzo-18-crown-6] exhibits good chemical stability, reusability, and faster rate equilibrium for the separation of Gd(III). Both uptake and stripping of metal ions were rapid, indicating a better accessibility of the complexing sites. The proposed method has been applied for chromatographic separation of Gd(III) by using picric acid as medium and poly[dibenzo-18-crown-6] as stationary phase. The influences of picric acid concentration, different eluting agents, and so forth, were discussed and the optimum conditions were established. The breakthrough capacity of poly[dibenzo-18-crown-6] for Gd(III) was 0.572±0.01 mmolg-1 of crown polymer. The proposed method has been applied to sequential chromatographic separation of their binary and multicomponent mixtures. Gd(III) has been determined from real samples with good analytical reliability.

Fiber Optic Aided Spectrophotometric Determination of Gadolinium in FBR Reprocessing Streams

“…However, majority of these instruments are costly and needs high caring during the analysis. On the other hand, more popular and economical spectrophotometric determination of gadolinium with variety of chromogenic reagents such as Xylenol Orange [13], Arsenazo (III) [14][15], poly[dibenzo-18-crown-6] [16], tetra ethylene penta amine hepta acetic acid (TPHA) [17], 1-(2-pyridylazo)-2-naphthol (PAN) [18], Di-n-buthyl dithiocarbamate [19], 1,10-Phenantroline [20], 2-(5-bromo-2-pyridyl 5-diethylazo)-diethylamine phenol (Br-PADAP) [21] and direct [22] are being used. The aim of present communication is to highlight the development of new spectrophotometric method for the determination of gadolinium present in nitric acid medium.…”