2004/10/27 | 指示剂[Indicator]
类别(℃〖化学〗) | 评论(0) | 阅读(25) | 发表于 13:19

A chemical which changes properties (usually color) under certain chemical conditions, usually pH.

indicator acidic basic
bromthymol blue yellow blue
litmus red blue
methyl orange red yellow
phenolphthalein colorless red

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