USP 39 的<1092>,看到了如下这样的一句话来解释Q的:the acceptance criteria for a dissolution test is a function of Q, which is expressed as a percentage of label claim of drug dissolved at a specified time。
英国药典溶出度的“Q”,如果是BP2008之后收录的品种,它的限度是Q=75%@45min, BP2008之前的就是 Not less than 70% @45min。