As for the poor solubility of tobramycin crystalline product in working medium used in volumetric Karl Fischer titration, two new methods for the water content determination were investigated.
由于妥布霉素固体颗粒在常用滴定溶剂中的溶解度不大，采用常规的卡氏容量法难以快速精确的确定其水含量。
2
The determination of purity of copper -phthalocyanine is discussed brie fly. The volumetric and weight operation procedures are introduced. Two methods are compared and discussed.
简要论述了铜酞菁纯度的测定；介绍了容量法和重量法的操作过程，并对其进行了对比和探讨。
3
Accurate determination of the gas phase density is very important for the reliability of adsorption measurements in both volumetric and gravimetric methods.