Hi Salim,

here is a list of contract service labs doing LC/MS analysis:

https://www.sisweb.com/index/referenc/msservic.htm

https://www.eag.com/techniques/mass-spec/lc-ms-ms/

https://www.contractpharma.com/csd/contract-services-directory/bioanalytical-analysis-lc-ms-ms

Regards

Markus

P.S.: Ignore the first answer of Mr. Hayakawa.

That has nothing to do with your question at all.

The University of Manchester, School of chemistry.

@Hayakawa,

Many thanks for your suggestion and the good papers, but I think what you suggested concern only your field of research. In our research, We are dealing with plant samples and LC-MS/MS is the best qualitative and quantitative method.

@Markus,

Thank you very much for sharing these extremely helpful Links.

@Jalal,

Thank you very much for your contribution to the discussion.