Application and optimization of HDEHP extraction chromatography in the determination of strontium-90 in seafood
10.13491/j.issn.1004-714X.2025.02.015
- VernacularTitle:HDEHP萃取色层法测定海产品中Sr-90的应用及优化
- Author:
Cen SHI
1
;
Yuhan XIE
1
;
Yuxin QIAN
1
;
Yanqin JI
1
Author Information
1. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Key Laboratory ofRadiological Protection and Nuclear Emergency, China CDC, Beijing 100088 China.
- Publication Type:OriginalArticles
- Keywords:
Strontium-90;
Extraction chromatography;
Seafood;
Radioactivity measurement
- From:
Chinese Journal of Radiological Health
2025;34(2):231-236
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the environmental radioactive safety level in China, monitor the radioactivity of strontium-90 (90Sr) in seafood from selected marine regions of China, and optimize the di-(2-ethylhexyl)phosphoric acid (HDEHP) extraction chromatography method for determining Sr-90 in seafood. Methods In 2023, seafoods of fish, shrimp, shellfish, and seaweed were collected from the Shandong Province (Bohai Sea and Yellow Sea) and Hainan Province (South China Sea). The levels of Sr in the samples were determined by inductively coupled plasma atomic emission spectrometer (ICP-AES). The 90Sr separation were performed using HDEHP extraction chromatography, while the recovery of 90Sr were determined by the gravitmetry with the assistant of ICP-AES. Results The content of strontium in seafoods varies greatly, and excessive strontium and calcium in seafood may lead to overestimated recovery due to insufficient leaching during chromatographic separation by HDEHP extraction. Therefore, the yttrium content in the eluent should be analyzed by ICP . The radioactivity of 90Sr in seafood from the sea areas in Shandong Province was 0.22-1.85 Bq/kg (dry weight), and that of seafood from Hainan Province was 0.19-1.82 Bq/kg (dry weight). Conclusion For the analysis of shirmp and seaweed samples, the recovery rate of 90Sr should be analyzed using both gravimetry and ICP-AES. There is no significant linear correlation between total Sr and 90Sr in seafood. There is no significant difference in 90Sr radioactivity between the seafood samples collected from Shandong and Hainan. The 90Sr radioactivity levels of all 28 samples are below the limit specified in the Limited concentrations of radioactive materials in foods (GB 14882—1994) and are within the range of environmental background fluctuations.
