一种是Phenolphthalein Solution,另外一种是Phenolphthalein Solution R1,这两种有什么不一样,制备方法如下 Phenolphthalein Solution:Dissolve 0.1 g of phenolphthalein in 80 mL of alcohol and dilute to 100 mL with water. Phenolphthalein Solution R1: A 1.0% w/v solution of phenolphthalein in ethanol (96%).不太明白R1是如何配置的,求教??
原文由 sdlzkw007(sdlzkw007) 发表: Phenolphthalein Solution R1: A 1.0% w/v solution of phenolphthalein in ethanol (96%).翻译过来就是质量体积浓度的酚酞溶液配制:把酚酞称取适量溶解在96%的乙醇中,使得浓度为1.0克/升,个人理解