摘要
对市售丁腈橡胶样品依据行业标准SH/T 1157.2-2015进行了结合丙烯腈含量的均匀性和稳定性检验。方差统计结果表明:丁腈橡胶结合丙烯腈含量均匀性检验的统计量F值为1.98,小于临界值2.31,说明结合丙烯腈含量均匀。样品经过一年时间的稳定性考察,12个测量点的t检验值,均小于t_α(n-1)临界值4.30,说明一年时间内结合丙烯腈标准物质候选物稳定,满足标准物质研制的要求。
The uniformity on bound acrylonitrile content of NBR was tested under industry stanoaru memou.restrlts of variance indicated that statistic value F of the uniformity on bound acrylonitrile content was 1.98, lower thancritical value ( Fa = 2. 31 ) , it showed that the bound acrylonitrile content of NBR sample was uniformity. The statisticvalue of 12 measuring points of stability investigation of samples after one year was lower than critical value 4.30 and thebound acrylonitrile content had not changed significantly in this year, it showed that the sample was stability. Therefore,the uniformity and stability on bound acrylonitrile content of the batch sample was able to reach the requirements of boundacrylonitrile content reference materials.
出处
《广州化工》
CAS
2017年第10期129-131,共3页
GuangZhou Chemical Industry
关键词
丁腈橡胶
结合丙烯腈含量
标准物质
样品评价
NBR
bound acrylonitrilecontent
reference materials
evaluation of samples