Figure 2.
Separation of five biogenic amines (50 pmol each on-column) on an Atlantis T3 column (150 x 2.1 mm, 3 μm particle size) at 25°C with a flow rate of 200 μL/min of 0.2% formic acid-methanol (98/2, v/v). Peaks were detected by tandem mass spectrometry with multiple reaction monitoring of the ion transition pairs as follows: (1) noradrenaline 170→152, (2) adrenaline 184→166, (3) normetanephrine 166→134, (4) dopamine 154→137 and (5) metanephrine 180→148. The smaller normetanephrine peak is due to the 184→166 ion pair which is common with adrenaline.