90Sr in Chinese tea of typical regions: activity concentration and hygienic evaluation / 中华放射医学与防护杂志
Chinese Journal of Radiological Medicine and Protection
; (12): 367-371, 2017.
Article
en Zh
| WPRIM
| ID: wpr-610069
Biblioteca responsable:
WPRO
ABSTRACT
Objective To investigate the activity concentration of 90St in tea produced in Chinese typical regions,enrich the baseline data for 90Sr level in Chinese tea,and evaluate possible exposure doses to people.Methods Samples were carbonized,ashed,digested and leached,and then extraction chromatography method was used to separate 90Sr and 90y.After preparation of sample source,radioactivity of 90Y was measured using low-level α/β counter.Results Twenty six kinds of tea produced in 16 typical regions from 26 cities of 16 provinces were collected in 2016,and their 90Sr activity concentrations were analyzed using the separation method of di (2-ethylhexyl) phosphate (HDEHP) extraction chromatography.The results revealed that the activity concentrations in 26 kinds of tea samples ranged from 0.28 to 3.78 Bq/kg,and contributed possible exposure doses of 0.44 × 10-2-6.00 × 10-2 μSv to each people.Conclusions These doses were far less than the ICRP annual dose limit of 1 mSv for the public,suggesting less impact on people's health.
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Base de datos:
WPRIM
Idioma:
Zh
Revista:
Chinese Journal of Radiological Medicine and Protection
Año:
2017
Tipo del documento:
Article