压汞法总孔容和孔径标准物质的研制  

Development of Certified Reference Materials for Total Pore Volume and Pore Size by Mercury Porosimetry

作　　者：关铖灏 王海[2] 金劭[1] 王梅玲[2] 刘俊杰[2] 

机构地区：[1]北京化工大学理学院,北京100029 [2]中国计量科学研究院,北京100029

出　　处：《化学试剂》2014年第9期824-828,共5页Chemical Reagents

基　　金：国家科技支撑计划项目(2011BAK15B05)

摘　　要：选择市售的氧化铝颗粒作为压汞法总孔容和（平均、最可几和中位）孔径标准物质候选材料,采用交叉缩分（Cross riffling）方法对标准物质进行分装。检验表明,均匀性和稳定性（9个月）良好。采用国际公认的压汞法,联合测量能力经确认过的8家实验室对标准物质定值,结果显示总孔容为0.413 cm3/g,平均孔径为14.77 nm,最可几孔径为11.71 nm和中位孔径为13.97 nm。研制的标准物质填补了国内空白,且其相对不确定度（2.9%~6.0%）达到国际同类标准物质的同等水平。The commercial AI203 pellets were used as the candidate for certified reference material （ CRM ） for total pore volume and （mean, most frequent and median） pore size by mercury porosimetry and subpackaged by means of cross riffling method. The homogeneity and stability tests showed that the CRM was homogeneous and stable for at least 9 months, respectively. The total pore volume （0.413 cm3/g）, mean pore size （ 14. 77 nm）, most frequent pore size （ 11.71 nm） and median pore size（ 13.97 nm） were certified by internationally recognized mercury purosimetry among eight validated separate laboratories. Compared with the similar CRMs in the world, it was showed that the developed CRM for total pore volume and （mean, most frequent and median） pore size by mercury porosimetry fills the domestic blanks and its relative uncertainty （ 2.9% to 6.0% ） comes up to the same world level.

关 键 词：标准物质 总孔容 孔径 压汞法 氧化铝 

分 类 号：TB9[一般工业技术—计量学]