【摘要】 研究了差热分析(DSC)法测定化工品、药品纯度的条件,测定的最佳条件为升温速率0.7℃/min,样品量2～3mg,保护气流速20～40mL/min。测定结果的RSD为0.02％,F检验及t检验的结果表明,该方法与容量法无显著差异,该方法简便、快速、准确,适合化工品、药品的定量测定。更多还原

【Abstract】 The purity determination condition of chemicals and pharmaceuticals by DSC technique was introduced. The optimal testing conditions are: heating ramp being 0.7℃/min, sample weight being 2 - 3 mg and gas flow rate being 20 - 40 mL/min. The experiments yielded good result: there is no significance between DSC and conventional method by F-test and t-test, and RSD is 0.02% . It can be used in the quantative determination of chemicals and pharmaceuticals with its accuracy, convenience and practicality.更多还原