差示扫描量热法高效测定联二脲纯度初探

Discussionon the Accuracy for the Purity Determination of Biureaby Differential Scanning Calorimetry

本文探讨了使用差示扫描量热仪（DSC）准确测定联二脲产品纯度的可能性。通过对比实验发现，传统化学计量差减法测试得到的联二脲样品纯度与采用DSC方法测定得到的结果基本一致，因此可以采用DSC方法代替差减法来高效测定联二脲产品的纯度。相比而言，DSC法具有样品用量少，准确度优异，测试效率高等优点。

The present article compared the testing accuracy of the purity determinationof biureabetween the Differential Scanning Calorimetry （DSC） and the conventional titration method. It shows that the purity of the biurea sample determined by theStoichiometric Difference Subtraction （SDS） is basically in accordance with the testing result obtained from the DSC. Therefore, biurea product purity can be efficiently determined by DSC instead of SDS. Besides, DSC method needs less sample amount and has higher testing accuracy.