Analytical Sciences

Modification of a Porous Sheet (MAPS) for the High-Performance Solid-Phase Extraction of Trace and Ultratrace Elements by Radiation-Induced Graft Polymerization

Shiho ASAI,* Kazuyoshi MIYOSHI,** and Kyoichi SAITO**

*Division of Environment and Radiation Sciences, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
**Department of Applied Chemistry and Biotechnology, Chiba University, Inage, Chiba 263-8522, Japan

In this review, the preparation of a novel porous sheet designed for solid-phase extraction (SPE) and a comparison of the preconcentration performance of metal ions with conventional sorbents are described. A porous sheet (MAPS) with an average pore diameter, porosity, and a thickness of 1.0 μm, 75%, and 2 mm, respectively, was modified into an sorbent used for solid-phase extraction, by radiation-induced graft polymerization. Ion-exchange and chelating groups were immobilized onto polymer chains grafted to the MAPS. Also, extractants were impregnated via a hydrophobic interaction with long alkyl chains introduced into the grafted polymer chains of the MAPS. The applicability of the resultant modified MAPSs was demonstrated by adopting them to analyses of real samples.

J-STAGE: View this article in J-STAGE