环境样品中^(90)Sr检测过程的质量控制与评价方法  

Quality Control and Evaluation Method for Analysis Process of ^(90)Sr in Environmental Sample

作　　者：吴连生[1] 黄彦君[1] 陈超峰[1] 郭贵银[1] 杨立涛[1] 上官志洪[1] 

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《原子能科学技术》2016年第5期789-797,共9页Atomic Energy Science and Technology

摘　　要：为确定实验室对环境样品中^(90)Sr的检测能力,保证检测结果准确可靠,需经常性地开展实验室内外部质量控制。本文针对^(90)Sr分析中原有的质量控制与评价方法的不足,通过对质控图评价法、E_n值法、Z比分数法和临界值法的详细研究,结合实例对环境样品^(90)Sr检测过程的内外部质量控制与评价方法进行了较为系统的探讨。对于内部质量控制和评价方法:空白样品可采用质控图和判断限评价;平行双样可采用临界值法评价;掺标盲样和放化回收率检验均可采用E_n值法评价;人员间比对可采用临界值法、E_n值法、Z比分数法和t检验法。对于外部质量控制和评价方法:测量审核可采用临界值法、E_n值法和Z比分数法;能力验证可采用E_n值法和Z比分数法。In order to confirm lab＇s testing ability of ^（90） Sr in environmental samples,ensure test results＇ accuracy and reliability,quality control activities such as internal and external tests are needed normally.The defects of the old quality control and evaluation methods for the analysis of ^（90） Sr were discussed.The evaluation method of quality control chart,the value of Enmethod,Z-score method and critical value method were exhaustively studied,and a systematic discussion for the internal and external quality control and the evaluation method for analysis process of ^（90） Sr in environmental sample with example was made.As for internal quality control and evaluation methods,blank samples can be evaluated by the quality control chart and judgment limit,parallel double samples can be evaluated by the critical value method,spiked blind sample and radiochemistry recovery rate test can be evaluated by the value of E_n method,and the evaluation of comparison between personnel can be evaluated by the critical value method,value of E_n method,Z-score method and t test method.As for external quality controland evaluation methods,the critical value method,value of E_nmethod and Z-score method can be used for the evaluation of the measurement audit,and the capacity verification can be evaluated by the value of E_n method and Z-score method.

关 键 词：90Sr 质量控制 评价方法 En值法 Z比分数法 临界值法 

分 类 号：O614.232[理学—无机化学]