%0 Journal Article
%T The water content reference material of water saturated octanol<br>水的饱和辛醇溶液水分标准物质的研制
%A Haifeng Wang
%A Kang M
%A Wei Zhang
%A Zhanyuan Li
%A <br>王海峰
%A 马康
%A 张伟
%A 李占元
%J 生物工程学报
%D 2011
%I 
%X The national standards of biofuels specify the technique specification and analytical methods. A water content certified reference material based on the water saturated octanol was developed in order to satisfy the needs of the instrument calibration and the methods validation, assure the accuracy and consistency of results in water content measurements of biofuels. Three analytical methods based on different theories were employed to certify the water content of the reference material, including Karl Fischer coulometric titration, Karl Fischer volumetric titration and quantitative nuclear magnetic resonance. The consistency of coulometric and volumetric titration was achieved through the improvement of methods. The accuracy of the certified result was improved by the introduction of the new method of quantitative nuclear magnetic resonance. Finally, the certified value of reference material is 4.76% with an expanded uncertainty of 0.09%.
%K water content
%K reference materials
%K uncertainty
%K Karl Fischer coulometry
%K Karl Fischer volumetry
%K quantitative nuclear magnetic resonance<br>水分，标准物质，不确定度，卡尔·费休库仑法，卡尔·费休·容量法，核磁共振
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A66E90C274451689E69F6F0291467824&aid=89735A82CCEE732F31B00A53D2BFE911&yid=9377ED8094509821&vid=DB817633AA4F79B9&iid=38B194292C032A66&sid=25467A5A28500A25&eid=F204392B3B11C3BD&journal_id=1000-3061&journal_name=生物工程学报&referenced_num=1&reference_num=16