Monitoring phospholipids for assessment of ion enhancement and ion suppression in ESI and APCI LC/MS/MS for chlorpheniramine in human plasma and the importance of multiple source matrix effect evaluations.

Abstract

Biological matrix effects are a source of significant errors in both electrospray (ESI) and atmospheric pressure chemical ionization (APCI) LC/MS. Glycerophosphocholines (GPChos) and 2-lyso-glycerophosphocholines (2-lyso GPChos) are known to fragment to form ions at m/z 184 and m/z 104, respectively. Phospholipids were used as markers to evaluate matrix… (More)
DOI: 10.1016/j.jchromb.2008.08.032

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