A brown or metallic green dye, C20H 12o 7, used as a pHindicator and in dyeing textiles.
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。
2
Taking alcoholicity as the indicator, the effects of initial sugar content, initial pH, inoculum size and temperature on the fermentation of the wine were investigated.
以酒精度为指标，研究了初始糖度、初始酸度、接种量和发酵温度对凉薯果酒发酵的影响；
3
It USES distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PHindicator.