The effect of some kinds of acid, alkali and salt on the transparency and viscosity of gelatin, which are usually used, is studied in extractive gelatin.
研究了明胶提取过程中，几种常用酸碱盐对明胶透明度和黏度的影响。
It USES distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PH indicator.
用蒸馏水或乙醇水溶液抽提试样中的水溶性酸或碱，然后用酸度计或指示剂对抽提物进行测定。
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