物质纯度

HPLC检定二氨基甲苯参考物质纯度的研究

Purity verification for toluenediamine reference materials by HPLC

自制异恶草酮标准物质纯度、均匀性及稳定性测定

Determinations of purity , uniformity and stability for self-prepared working standard of clomazone

介绍了差示扫描量热法单峰测定物质纯度的装置和基本原理，说明了纯度分析软件的计算方法。

The basic principle and device are described for the determination of purity of samples by monopeak method of differential scanning calorimetry . The calculation theory of purity analysis software is explained .

两种不同原理纯度检测方法联合检测定值结果为N-苯基-β-萘胺标准物质的纯度为99.3%，合成标准不确定度为0.5%。

Then the value of SRM of N-phenyl - β - naphthylamine is 99.3 % and the combined standard uncertainty is 0.5 % .

随着生产质量的提高，晶体物质的纯度对生产过程中产品的质量起着至关重要的作用。

With the improvement of the producing process , the purity of the crystal material plays a very important role in the products ' quality .

通过外标物的对照，1H-NMR进行结构鉴定，HPLC进行纯度分析，确定得到的物质为姜黄素，纯度为94.06%。

Through the analysis of () ~ 1H-NMR and HPLC , and with the comparison of the standard substance , the curcumin with the purity of 94.06 % was obtained .

任何掺入物质（降低一种物质的纯度或效力）。

Any substance that adulterates ( lessens the purity or effectiveness of a substance ) .

经过几年的研制，标准物质达到了任务书技术指标要求：防老剂BHT标准物质的纯度为99.1，合成标准不确定度为0.5%；

With three years development , standard reference materials of antioxidant BHT has achieved the technology target of task book requirements : The purity of antioxidant BHT SRM is 99.1 ± 0.5 % ;