検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Rapid analytical method of $$^{90}$$Sr in urine sample; Rapid separation of Sr by phosphate co-precipitation and extraction chromatography, followed by determination by triple quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS)

尿試料中の$$^{90}$$Sr迅速分析法; リン酸塩共沈及び抽出クロマトグラフィーによるSrの迅速分離とトリプル四重極誘導結合プラズマ質量分析(ICP-MS/MS)による定量

富田 純平; 竹内 絵里奈

Tomita, Jumpei; Takeuchi, Erina

緊急時における作業者の内部被ばくを評価するために、尿中$$^{90}$$Sr迅速分析法を開発した。尿試料中のSrはリン酸塩共沈及びプレフィルター, TRUレジン及びSrレジンのタンデムカラムを用いた抽出クロマトグラフィーにより迅速に分離され、$$^{90}$$Sr濃度はトリプル四重極誘導結合プラズマ質量分析(ICP-MS/MS)により定量された。1mL min$$^{-1}$$の酸素リアクションガス流量でMS/MSモードにより測定したところ、50mg-Sr L$$^{-1}$$までは、m/z=90における$$^{88}$$Srのテーリングは見られなかった。m/z=90の干渉となるGe, Se及びZrは、化学分離により除去された。既知量の$$^{90}$$Srと1mgのGe, Se, Sr及びZrを含む合成尿(1.2-1.6L)を用いて分析法の妥当性を確認した。尿試料からのSrの分離及びICP-MS/MSによる$$^{90}$$Sr測定に要する時間は約10時間、検出限界値は尿試料あたり1Bqであった。

A rapid analytical method for determining $$^{90}$$Sr in urine samples (1-2 L) was developed to assess the internal exposure of workers in a radiological emergency. Strontium in a urine sample was rapidly separated by phosphate co-precipitation, followed by extraction chromatography with a tandem column of Pre-filter, TRU and Sr resin, and the $$^{90}$$Sr activity was determined by ICP-MS/MS. Measurement in the MS/MS mode with an O$$_{2}$$ reaction gas flow rate 1 mL min$$^{-1}$$ showed no tailing of $$^{88}$$Sr at m/z = 90 up to 50 mg-Sr L$$^{-1}$$. The interferences of Ge, Se and Zr at m/z = 90 were successfully removed by chemical separation. This analytical method was validated by the results of the analyses of synthetic urine samples (1.2-1.6 L) containing a known amount of $$^{90}$$Sr along with 1 mg of each of Ge, Se, Sr and Zr. The turnaround time for analysis was about 10 h, and the detection limit of $$^{90}$$Sr was approximately 1 Bq per urine sample.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.