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Why9999
New Member
 
Joined: 04 Dec 2010
Posts: 6
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Thu Dec 09, 2010 12:09 pm  |
I was reading a study that utilized a 1% solution. My question is this: is this generally mass/volume, i.e. 1 gram of the active ingredient per 100 ml of solution?
I have also read that you can do volume/volume and weight/weight percent solutions. But what do they usually do in studies as that is my case here.
(Btw, I know this is likely a common question, but I cannot find the answer. I have been Googling and poking around and just can't find a definitive answer.) |
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Thu Dec 09, 2010 8:01 pm |
If the substance to be added is a solid, a 1% solution is 1g/100ml of solution.
If the substance to be added is a liquid, a 1% solution is 1ml/100ml of solution.
If the substance to be added is already a percent solution, for example a 25% solution, then the amount added would be adjusted accordingly.
The final volume of solution would be a q.s. volume. All this means is that you start with less than 100 ml and then in the end add liquid to reach 100 ml. q.s. simply means quantity sufficient. |
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Why9999
New Member
Joined: 04 Dec 2010
Posts: 6
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Fri Dec 10, 2010 5:59 am |
Thanks!
One other question: how do you find what is a good base for a compound/substance? Where can you look that up or how? |
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