丙烯腈-丁二烯橡胶中结合丙烯腈含量标准物质的定值与不确定度评定  

The Fixed Value and Uncertainty Evaluation of the Content of Bound Acrylonitrile Reference Material for Acrylonitrile-Butadiene Rubber

作　　者：黄世英[1] 刘俊保[1] 蒋攀 曹帅英[1] HUANG Shi-ying;LIU Jun-bao;JIANG Pan;CAO Shuai-ying(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,Petro China Company Limited,National Quality Inspection and Testing Center of Synthetic Rubber,Lanzhou 730060,Gansu,China;Synthetic Rubber Plant,Lanzhou Petrochemical Company,Petro China,Lanzhou 730060,Gansu,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院、兰州化工研究中心、国家合成橡胶质量检验检测中心,甘肃兰州730060 [2]中国石油兰州石化公司合成橡胶厂,甘肃兰州730060

出　　处：《合成材料老化与应用》2024年第1期50-52,共3页Synthetic Materials Aging and Application

摘　　要：标准物质的研制一般经过均匀性检验、稳定性检验、定值和不确定度评定等重要环节。而标准物质的定值关系到标准物质标准值是否准确可靠,标准物质的定值工作显得尤为重要。丙烯腈-丁二烯橡胶NBR 2880中结合丙烯腈含量标准物质的定值采用6家行业权威实验室联合定值,采用狄克逊(Dixon)法检验组间、组内是否存在可疑值;夏皮罗-威尔克Shapiro-Wilk法(W检验)检验定值数据是否正态分布;柯克伦(Cochran)法检验定值数据是否等精度。通过定值数据的统计分析,在p=0.95的置信概率时,定值数据均处于等精度、正态分布、无可疑值。经过定值和不确定度评定,丙烯腈-丁二烯橡胶NBR 2880结合丙烯腈含量标准物质的标准值为(31.5±0.4)%。The development of reference materials goes through the important steps of uniformity test,stability test,value determination and uncertainty evaluation.The fixed value of the reference material is related to the accuracy and reliability of the nominal value,therefore,that is particularly important.Combined with 8 laboratories to determine the value,the fixed data were tested whether there were abnormal data between and within groups by Dixon method,whether were normal distribution by Shapiro-Wilk method(W test),whether were equal precision by Cochran method.Through the statistical analysis,when the confidence probability p=0.95,the fixed data were in equal precision,normal distribution and no suspicious value.The nominal value of acrylonitrile content reference material was(31.5±0.4)%,after fixed value and uncertain evaluation of acrylonitrile-butadiene rubber NBR 2880.

关 键 词：结合丙烯腈 含量 标准物质 定值 不确定度 评定 

分 类 号：TQ333.7[化学工程—橡胶工业]