2009-2014年水中总放射性测量比对结果与分析

目的 保证饮用水中总α、总β放射性测量结果的准确度,提高监测工作的质量,减少因方法引入的系统误差。方法 每年参加国家组织的水样总放射性测量比对考核,抽取2009-2014年的比对测量结果进行分析和评估。结果 2009-2014年5次比对测量结果中,总α放射性测量偏差最高为9.30%(2014年),最低为-2.04%(2010年);总β放射性测量偏差最高和最低分别为-20.5%(2011年)和-2.13%(2012年)。能力评价表明,2009-2011年结果为合格,2012年和2014年为优秀。结论 通过水中总放射性测量比对能及时发现并纠正测量系统偏差,保证测量结果的准确性并提高检测能力。

Comparison Result and Analysis of the Total Radioactivity Measurement in Water During 2009-2014

Objective To ensure the accuracy of gross α and gross β radioactivity measurement in drinking water, improve the quality of monitoring, reduce the system error caused by the introduction of the method.Methods Processing and measuring comparison water sample, then analyzing and evaluating the comparison result from 2009 to 2014.Results With the same method, the five times of measurement results from 2009 to 2014 show that for gross α and gross β,the max deviation and min deviation is 9.30% (in 2014)/-2.04% (in 2010) and 20.5% (in 2011)/-2.13% (in 2012), respectively. Capacity evaluation indicates the qualified results from 2009 to 2011 and the excellent results from 2012 to 2014.Conclusion The deviation of the measurement system can be found and corrected in time through the total radioactivity measurement in water, thus ensure the accuracy of the measurement results and improve the detection capability.