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. Author manuscript; available in PMC: 2014 Nov 15.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2013 Sep 8;939:23–31. doi: 10.1016/j.jchromb.2013.09.004

Fig. 3.

Fig. 3

Representative MRM chromatogram of a human urine standard containing each analyte of interest at the assay limit of quantification (0.01 ng/ml for all). In each panel, the blue trace is blank plasma, and the red trace is the analyte at the limit of quantification.