If any of you guys have access to a chemistry lab you could run an IR and/or NMR of the extracted sample. If you could obtain either of these two test results (both would be ideal) I could analyze them and estimate the paracetamol percentage.
If worst comes to worst you could do a density test. Measure out a precise amount of the extracted sample, weigh, and calculate the density. Then use the masses of each component to give a ballpark estimate of the concentration of each.
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