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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。
Objective To ensure the accuracy of total α and total β radioactivity in drinking water, improve the quality of monitoring work and reduce the systematic errors introduced by the method. Methods Participate in the annual national organization of the total radioactive water than the test, the extraction of 2009-2014 comparison results of the analysis and evaluation. Results The results of the five comparison tests from 2009 to 2014 showed that the deviation of the total α-radioactivity was the highest at 9 30% (2014) and the lowest -2.04% (2010), the highest and lowest total β-radioactivity was -20.5% (2011) and -2.21% (2012). Competency assessments show that the 2009-2011 results are satisfactory and 2012 and 2014 are excellent. Conclusion The total radioactivity in water can be compared to find and correct measurement system deviation in time to ensure the accuracy of the measurement results and improve the detection capability.