论文部分内容阅读
目的探索蜂胶软胶囊的酸价测定方法。方法根据蜂胶软胶囊的处方,取蜂胶粉、白蜂蜡、植物油脂、抗氧化剂、不含蜂胶粉的混合油脂(内含白蜂蜡、植物油脂、抗氧化剂)、蜂胶软胶囊,分别用方法 1和方法2测定酸价,以10 g/L酚酞溶液或电位滴定仪指示终点。结果方法 1,因蜂胶粉的干扰而无法测定蜂胶软胶囊的酸价;方法 2,以10 g/L酚酞溶液指示终点时,在滴定过程中会出现黄色,影响终点的判断,采用电位滴定仪指示终点,指示效果明显,能得到良好的精密度。按方法 2测定蜂胶软胶囊酸价,用电位滴定仪指示终点,测得不同批次样品重复测定结果的精密度为0.9%~2.6%,不同批次样品不同时间测定结果的精密度为2.4%~3.7%,测得回收率为95.6%~105.0%,平均回收率为100.0%,RSD(%)为3.5%。结论采用方法 2,用电位滴定仪指示终点,能够很好消除蜂胶软胶囊内容物中蜂胶粉对蜂胶软胶囊酸价测定的干扰,测定结果精密度良好,准确度高,能对蜂胶软胶囊的酸价起到质量控制的目的。
Objective To explore the method of determining the acid value of propolis soft capsule. Methods According to the prescription of propolis soft capsule, propolis powder, white beeswax, vegetable fat, antioxidants, mixed fat without propolis powder (including white beeswax, vegetable fat, antioxidant) Method 2 Determination of acid value to 10 g / L phenolphthalein solution or potentiometric titration instrument indicates the end. Results Method 1, due to the interference of propolis powder can not determine the price of propolis soft capsules; Method 2, 10 g / L phenolphthalein solution indicates the end point, the titration process will appear yellow, determine the end point, using potentiometric titrator Indicate the end point, indicate the effect is obvious, can get good precision. The acid value of propolis soft capsule was measured by method 2 and the end point was measured by potentiometric titration. The precision of the repeated determination of different batches of samples was 0.9% -2.6%. The precision of different batches of samples at different time was 2.4 % ~ 3.7%. The recovery was 95.6% ~ 105.0%, the average recovery was 100.0%, RSD (%) was 3.5%. Conclusions Using method 2, the end point of potentiometric titration can eliminate the interference of the propolis powder content in the contents of propolis soft capsules. The determination results are good precision and high accuracy, The acid value played the purpose of quality control.