请教欧洲药典中活性炭吸着力检验的原理

洋洋1234

欧洲药典中关于活性炭的吸着力检验如下：不懂检验原理，请各位同仁指导。
Adsorption power. To 0.300 g in a 100 mL ground-glass-stoppered conical flask add 25.0 mL of a freshly prepared solution of 0.5 g of phenazone R in 50 mL of water R. Shake thoroughly for 15 min. Filter and reject the first 5 mL of filtrate. To 10.0 mL of the filtrate add 1.0 g of potassium bromide R and 20 mL of dilute hydrochloric acid R. Using 0.1 mL of methyl red solution R as indicator, titrate with 0.0167 M potassium bromate until the red colouris discharged. Titrate slowly (1 drop every 15 s) towards the end of the titration. Carry out a blank titration using 10.0 mL of the phenazone solution.
Calculate the quantity of phenazone adsorbed per 100 g of activated charcoal from the following expression:
[size=9.0018pt] 2.353( [size=12.0024px]a-b[size=9.0018pt])/m
a= number of millilitres of 0.0167 M potassium bromate used for the blank;
b= number of millilitres of 0.0167 M potassium bromate used for the test;
m= mass in grams of the substance to be examined.
Minimum 40 g of phenazone is adsorbed per 100 g of activated charcoal, calculated with reference to the dried substance.

我理解的是活性炭吸附二甲基苯基吡唑酮，溴酸钾再去与剩余的二甲基苯基吡唑酮反应，不知道对不对。不理解的是原理是什么？溴化钾在其中有什么作用？公式中的2.353是什么参数，怎么计算来的。请各位指导。

wenzhao10

我是来帮忙顶帖的