For terpenoids:
http://chromsci.oxfordjournals.org/content/45/4/189.long
for a complete review with references of different types of chemistries and their analysis look at this review
http://www.academicjournals.org/article/article1383309416_Reddy%20and%20Murthy.pdf
hope these are useful
I f you are targeting tannins ,phenols and flavanoids I think you can try with c18 column and mobile phase of polarsolvents you can choose. I think dveloping your method willbe interesting. If you are working with uv vis detector I think you can try with 254 nm.
I am also learing but I thinkits safe to develop methods by one by choosing optmum conditions for target molecules.
Dear Karthick,
If you are planning to look at flavonoids (and phenylcarboxylic acids), if present in your sample, refer to the following article. This gives you a general HPLC/UV/MS conditions for flavonoids and ways by which you could identify them (tentatively, at least).
A Screening Method for the Identification of Glycosylated
Flavonoids and Other Phenolic Compounds Using a
Standard Analytical Approach for All Plant Materials
Long-Ze Lin, and James M. Harnly
J. Agric. Food Chem., 2007, 55 (4), 1084-1096
I am sure this would help. If you are looking for catechin/procyanidin/oligomeric procyanidins, look for the methods prescribed in Pharmacopoeias (USP/BP) for green tea extracts or grape seed extracts monographs which gives you specific HPLC protocols that you could extend to LC-UV-MS detection.
Good Luck
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