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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Trends Analyt Chem. 2014 Oct 1;61:192–206. doi: 10.1016/j.trac.2014.04.017

Fig. 7.

Fig. 7

NP-HPLC-ESI(–)-MS/MS (QqQ) chromatograms of rat-brain extract separated on a Phenomenex Luna 3 μm Silica (150 × 2 mm I.D.; 3 μm) column with a gradient elution using mobile phase chloroform/MeOH/triethylamine/acetic acid (80:19:0.5:0.5) and chloroform/MeOH/H2O/triethylamine/acetic acid (60:33.5:5.5:1:0.065) at a flow-rate of 0.2 mL/min at room temperature. {Reproduced with permission from [28]}.