…It is a number ( A2 / A1 )×1000, which is the ratio of two quantities of the same type, A1 and A2 , multiplied by 1000. The unit is per mille , and the symbol is ‰. Per mille is written as permill or per mille in English and means 〈per 1000〉. For example, it is used to say that the amount of NaCl in seawater is 35‰ by mass. [Miyake Fumi]… *Some of the terminology explanations that mention "permill" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…同じ種類の二つの量A1,A2の比を1000倍して表した数値(A2/A1)×1000をいい,単位はパーミル,記号は‰である。パーミルは英語でpermillまたはper milleと書き,〈1000につき〉を意味する。例えば海水中のNaClの量は質量比で35‰であるというように使われる。【三宅 史】… ※「permill」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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