|
|
|
| A Preliminary Study on the Relationship between Measured Time and the Minimum Detectable Concentration (MDC) of Samples during Radioactivity Measurement of Food and Drinking-water |
| YAO Shuai-mo, ZHANG Qing, ZHOU Qiang, ZHANG Jing, LI Wen-hong, TUO Fei |
| National Institute for Radiological Protection, China CDC, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, Beijing 100088 China |
|
|
|
|
Abstract Objective To compare the MDC of radionuclides in food and drinking-water achieved by different measured time, and to provide reference material to deal with a nuclear or radiological emergency.Methods Measuring the MDC of radionuclides in Marinelli backer filled with samples which are drinking-water, milk and fresh spinach by the measured live time 2 hours, 4, 8, 12, 24 and 72 hours, respectively, then comparing the results with the values of operational intervention level 6 (OIL6) recommended by International Atomic Energy Agency (IAEA) and the guidelines for drinking-water quality recommended by World Health Organization (WHO).Results The MDC of the samples of drinking-water and milk are in the range of 0.04~0.30 Bq/kg, 0.05~0.34 Bq/kg and 0.05~0.36 Bq/kg for the 131I, 137Cs and 134Cs if measure them from 2 to 72 hours, but the MDC of the sample of fresh spinach is a little higher than that of drinking-water and milk. All the MDC we got are in conformity with the relevant standards, and the longer time we spent in measuring samples, the smaller MDC we would get.Conclusion In the condition of time permitting, we could take a longer measured time to improve the detectability, but in an emergency a cost-benefit analysis to choose the most suitable time to match the MDC is necessary.
|
|
Received: 01 December 2015
|
|
|
|
|
|
| Cite this article: |
|
YAO Shuai-mo,ZHANG Qing,ZHOU Qiang, et al. A Preliminary Study on the Relationship between Measured Time and the Minimum Detectable Concentration (MDC) of Samples during Radioactivity Measurement of Food and Drinking-water[J]. , 2016, 25(2): 150-153.
|
|
|
|
| URL: |
| http://www.zgfsws.com/EN/ OR http://www.zgfsws.com/EN/Y2016/V25/I2/150 |
|
|
|
