本人想报购USP的标准品,官方网站上先查询了该标准品的信息。看到Lable text 有一句话"Labled for qualitative use .keep container tightly .Material is hygroscopic....."就意味着这个标准品应该是定性标准品。但是在下面Caculation value 描述一项下面,又有一句话"If a value is not provide on lable or accompanying documentation and the reference standard has a quantitative usp compendial application,a value of 100.0% isused. The purity value is not applicable for qualitative uses.please refer to specific reference standard label for further information"。这句话意思应该是如果用于定量就算,纯度按100.0%计算。