This novel HPLC-FL method was successfully applied to serial plasma samples from an adult
subject participating in a MPH pharmacokinetic study and compared favorably with a GC-MS
method which was also performed on plasma aliquots taken from each time point sampling.
The investigators recognize that the lack of data on multiple subjects represents a limitation in
our assertion that this method is applicable to many clinical studies or single time point
determination, however, the majority of subject samples available to us had insufficient plasma
volume remaining after a previous analysis to split and compare methodologies. Nevertheless,
the samples for one subject collected in a controlled environment provide additional support
for our method beyond spiked plasma samples only, and some measure of comparison to
alternative methods of detection