Figure 1From: Absolute quantification of endogenous angiotensin II levels in human plasma using ESI-LC-MS/MSInvestigation of matrix effects by the post column infusion method defined by Bonfiglio et al. A: Scheme of the post-column infusion system B: Total ion chromatogram C: Overlay chromatograms showing the matrix effects due to purified plasma on the detection of angiotensin II.Back to article page