extraction indicator
... 比色指示剂 colorimetric indicator for ph 沉淀指示剂 precipitation indicator 抽提指示剂 extragenic promoter ...
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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。
It USES distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PH indicator.
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