Analytical Sciences

Development of Online Dilution System for Quantification of ⁹⁰Sr Using Automatic Solid-phase Extraction Inductively Coupled Plasma Mass Spectrometry

Kayo YANAGISAWA,* Makoto MATSUEDA,** Makoto FURUKAWA,*,*** and Yoshitaka TAKAGAI*

*Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
**Fukushima Environmental Safety Center, Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu, Tamura, Fukushima, 963-7700, Japan
***PerkinElmer Japan Co., Ltd., 134 Godo, Hodogaya, Yokohama, Kanagawa 240-0005, Japan

In this paper, we propose an online dilution system for the rapid quantification of radioactive strontium-90 (⁹⁰Sr) with inductively coupled plasma mass spectrometry coupled solid-phase extraction and O₂ dynamic reaction (cascade ICP-MS). The proposed system automatically provides a higher dilution ratio, which is at most 3.3 ± 0.2-times the ratio obtained by the previous method, without increasing the analysis time (<15 min). A detection limit of 2.7 Bq/kg wet (0.54 pg/kg wet) was achieved. The recovery test results were consistent with two different spiked values.

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