Ian Salveson: Research Log

June 15, 2016

Determine the effect of flow rate on product formation. Figure 1 below shows similar reactions with differing flow rates.

This figure shows flow rate has a small effect on product formation. This experiment was done at 2 additional concentrations with similar results.

June 16, 2016

Concentration of acetaminophen is increased in preparation for Flash Chromatography. Figure 1 below shows the effect of increasing concentration on product formation.

It appears that at higher concentrations, the reaction will begin to form polymeric material, despite relatively low concentrations of Hydrogen Peroxide.

Sample B will be separated using Flash Chromatography.

It is important to note that we have reached the max absorbance of our instrument.

Figure 2 below shows a set of samples under identical conditions as Figure 1 except with a flow rate of 2 ml/min.

The chromatography on this figure is faulty, specifically the changing retention time. The results also contradict what may have been expected of a faster flow rate. These samples should be run again if the data is deemed significant.

June 20, 2016

Sample C from June 16th was Lyophilized and reconstituted in a solution of 90% water and 10% ACN. This solution was filtered and analyzed once more using the HPLC see if any product was lost.

June 22, 2016

Peformed flash Chromotography on the prepped APAP sample from 6/20. Was able to collect a nonstandard peak. Below is a chromatogram of the complete mixture shown with the peak collected through flash.

There appear to be two impurities which are unaccounted for in the complete mixture.