Please refine your question and re-post. Your question at this moment does not mean anything. Search LC-MS + medicinal plants in Google Scholar if you need immediate help and start with experiments ! Best wishes.

Yes. Your question is not clear at all. Do you want to identify or quantify phenolic compounds by LC-MS? whatever it may be it is plant specific- the nature and type of phenolics. Be specific in your question so that you can get appropriate answer.

thanks for your answers.i nedd identification of phenolics compounds with lc ws of plants extracts.but I find no place where I can do this that analysis .so i search to find a laboratory to help me

Hey,

take a look at my research article about omw application on soil. There we analyzed some phenolic compounds by LC/MS. Maybe it can help you for your questions how the procedure could look like.

If you have questions, don't hesitate to ask.

Greetings