Reversed phase HPLC is a technique for separating and (usually) quantifying individual compounds in a mixture.
It separates on the basis of polarity or lipophilicity; the more fat soluble a compound is the more it is retained by the column in a HPLC system and the longer its retention time.
Dilantin (phenytoin) has a similar chemical structure to benzil (well slightly similar) and has similar water/oil solubilities. This means that on many reversed phase HPLC systems the retention times will be similar. I am sure it would be possible to adjust the mobile phase of the system to separate the materials if that was important.
If you need more HPLC info you could start with this link.
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Reversed phase HPLC is a technique for separating and (usually) quantifying individual compounds in a mixture.
It separates on the basis of polarity or lipophilicity; the more fat soluble a compound is the more it is retained by the column in a HPLC system and the longer its retention time.
Dilantin (phenytoin) has a similar chemical structure to benzil (well slightly similar) and has similar water/oil solubilities. This means that on many reversed phase HPLC systems the retention times will be similar. I am sure it would be possible to adjust the mobile phase of the system to separate the materials if that was important.
If you need more HPLC info you could start with this link.
http://en.wikipedia.org/wiki/HPLC