请教大家一个问题，美国药典中经常会出现溶液配制1 in100 之类的，具体是1：100，还是1ml加入到100ml（1：101），比如下面这种
To 2 mL of cupric sulfate solution (1 in 100) add 3 drops of a solution of Ethylenediamine (1 in 6), and shake: a purplish blue color is produced. Assay—Weigh accurately about 1 mL of Ethylenediamine in a tared, glass-stoppered §ask containing about 25 mL of water. Dilute with water to about 75 mL, add a mixed indicator of bromocresol green TS and methyl red TS (5 in 6)
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+1/192
