研究了酸碱指示剂茜素黄R颜色的模糊特性。
The fuzzy character of colour of the acid base indicator alizarin yellow R is studied in the paper.
本发明还可加入酚酞或酚酞类酸碱指示剂作显色指示。
Phenolphthalein or indicator of such a kind is used as colour indicator.
一种棕色或金属绿色染料，C20 H 12o 7，用作酸碱指示剂和用于给丝织物染色。
A brown or metallic green dye, C20H 12o 7, used as a pH indicator and in dyeing textiles.
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