A selectivity study of the examination of radionuclides Cesium-1 37 for foods based on different detection conditions
- VernacularTitle:食品中放射性核素137 Cs基于不同检测条件的方法选择研究
- Author:
Yi-Yao CAO
1
;
Zhi-Qiang XUAN
;
Shun-Fei YU
;
Yao-Xian ZHAO
;
Xin-Xing LI
Author Information
1. 浙江省疾病预防控制中心
- Keywords:
Food;
Cs-1 37;
γspectrometry;
Phosphoric acid ammonium molybdate method
- From:
Journal of Preventive Medicine
2016;28(5):437-440
- CountryChina
- Language:Chinese
-
Abstract:
Objective Aselectivitystudywasconductedthroughtheexaminationofradionuclides137Cs(Cesium-137)for foodbasedondifferentdetectionconditions.Methods Atotalof48foodsampleswereselectedfromthreeareasincluding Qinshan nuclear power plant,Sanmen nuclear power plant and Hangzhou and Zhoushan respectively.1 37 Cs of these samples were determined by γspectrometry and Phosphoric acid ammonium molybdate method.The level of 48 foods were statistically analyzed,and then the time consuming,sample size requirements,influence factors were comprehensively discussed,thustheselectionreferenceproposaloftheexaminationmethodcouldbeprovided.Results Therewereno significant difference for the data of two examination method (P>0.05 ).The limit of detection of the γspectrometry was lower (P <0.05 ).Compared with Phosphoric acid ammonium molybdate method,γspectrometry had lower limit of detection,and could detect a variety of radionuclides at a time,but need more sample and time-consuming when multi-sample were detected.The limit of detection of the Phosphoric acid ammonium molybdate method was high,and the chemicalprocessingstepswerecumbersomeandwaseasytobeinterferedby134Cs.Conclusion Thelimitofdetectionof the γspectrometry is low,and the sensitivity of the Phosphoric acid ammonium molybdate method is high.Most food are recommended to be detected by γspectrometry in the practical work,and the food which were difficult collected,less ash or low content,are recommended to be detected by Phosphoric acid ammonium molybdate method.
