Chromatography Forum

I am a new user of LCMS but 10 years on using HPLC-UV,Flourescence and Diode Array.

From previous post (Neuger),ion suppresion was discussed. I am also having the same problem with Neuger since I'm working on LCMS to determine antihypertensive drug in plasma at a very low conc. (0.5ppb) using liquid liquid extraction. I am having difficulty as experience by Neuger regards repeatability problem and inconsistent recovery.

As mentioned in the forum,the article of Matuswewski et al.,Anal Chem 75 (2003),3019 discuss ion suppresion,can I had a copy of that? or other literature that discuss ion suppresion?

Please help.

I can send you a copy of our work on solid-phase extraction, if you contact me.

I wrote an article on ion suppression..

http://users.chartertn.net/slittle/

also, you ought to get a copy of

http://www.amazon.com/Using-Mass-Spectr ... 0849319633

great resource for thinking about the problem..