Dear Matteo,

The publication contained in the following link describes an HPLC method for the analysis of total phospholipids such as phosphatidylethanolamine, sphingomyelin, phosphatidylcholine, phosphatidylinositol

http://www.cyberlipid.org/phlipt/pl40004.htm

Hoping this will be helpful,

Rafik

Hey Matteo!

Perhaps this won't be helpful, but while over in Canada I ran a few of these kits which analyse a range of metabolites including sphingomyelins, phosphatidylcholines etc.. 

http://www.biocrates.com/products/research-products/absoluteidq-p180-kit

Have a look, and if you think it might be suitable then I can put you in contact with the lab over there. They run a service (The Metabolomics Innovation Centre [TMIC]) and would run samples for a price, or maybe as a collaboration.

All the best,

Paul

Thanks guys I should have found an HPLC-MS  here in UCC that should work for my porpose.

- Paul, thanks for the hint, I will take that option under consideration as well.

Matteo