Improvement of Adsorption Performances of Sr Adsorption Fiber and Investigation for Realizing Simple ⁹⁰Sr Analysis

Abstract

We have developed a Sr adsorption fiber for the rapid analysis of ⁹⁰Sr. The prepared Sr adsorption fiber has a Sr-extraction layer that densely retains a Sr-selective extractant, an 18-crown-6 ether derivative, on the fiber surface. Hydrophobic group-containing polymer chains embedded onto the surface of the fiber allow one to form a hydrophobic phase, incorporating Sr-selective extractants. This unique surface structure provides high adsorption capacity, leading to the rapid and highly efficient adsorption of Sr²⁺. The adsorption capacity of the Sr adsorption fiber was 3-times higher than commercially available 18-crown-6 ether derivative-impregnated resin (Sr Resin^®). The equilibrium adsorption capacity of the Sr adsorption fiber was comparable to the Sr Resin^®. The retained ⁹⁰Sr was finally determined by a GM counter. The total analysis time, including the Sr adsorption and measurement, was about 1 hour.