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1)混合物组成标度“混合物”是指含有一种以上物质的气体相、液体相或固体相,在一般性讨论中不指出具体物质时,用B代表其中任何一种物质。GB 3102.8-93规定,表示混合物组成标度的量可分为3类:①分数;②比;③浓度。具体内容如下。B的质量分数用w表示,单位符号为1;B的体积分数用φ表示,单位符号为1;B的摩尔分数用x表示,单位符号为1。
1) Mixture composition scale “Mixture” means the gaseous, liquid or solid phase containing more than one substance. When no specific substance is indicated in the general discussion, B stands for any of them. GB 3102.8-93 provides that the composition of the scale composition can be divided into three categories: ① score; ② ratio; ③ concentration. The details are as follows. The mass fraction of B is expressed by w, the unit symbol is 1, the volume fraction of B is represented by φ, the unit symbol is 1, the mole fraction of B is represented by x, and the unit symbol is 1.