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Hi, I am trying to understand the difference between "quantity sufficient" and "quantity sufficient to make". I am practicing on math questions, and I noticed that some of the questions use "QS" and some use "QS AD".
For example, some say "sodium chloride qs ad 20 ml" and some say "glycerin qs 20 ml"
My understanding is that for both example questions above, you are adding the substance to make a final volume of 20 ml total. So if other ingredients are already making 15 mls then you're just adding 5 mls of the final substance to make a total of 20 mls. So essentially, qs and qs ad mean the same, right?
I would appreciate if anyone could clarify this. Thank you.
For example, some say "sodium chloride qs ad 20 ml" and some say "glycerin qs 20 ml"
My understanding is that for both example questions above, you are adding the substance to make a final volume of 20 ml total. So if other ingredients are already making 15 mls then you're just adding 5 mls of the final substance to make a total of 20 mls. So essentially, qs and qs ad mean the same, right?
I would appreciate if anyone could clarify this. Thank you.
