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。

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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。

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Accurate determination of the gas phase density is very important for the reliability of adsorption measurements in both volumetric and gravimetric methods.

无论采用容积法还是重量法测量吸附平衡，准确计算气相氢密度对于实验结果的可靠性是至关重要的。

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