DISCUSSION
The HPLC fingerprints of these standard phenolic compounds obtained using the methods described above would serve the purpose of established benchmarks for future plant research. The qualitative and quantitative analysis of the actual phenolic compounds present in any unknown plant sample would be facilitated by means of comparison with such standard chromatograms, enabling identification & confirmation of presence of any of these 12 common phenolic compounds in the research sample. The use of multiple methods involving different mobile gradient phases would increase the validity and reliability of the obtained results.