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. Author manuscript; available in PMC: 2009 Apr 30.
Published in final edited form as: Anal Biochem. 2007 Nov 28;375(1):105–114. doi: 10.1016/j.ab.2007.11.028

Fig. 6.

Fig. 6

MRM analysis of the CS-FBS blank and for E2 in serum at the LLOQ. The reconstructed ion chromatograms for (A) m/z 414 → 272 and (B) m/z 414 → 350 from the analysis of a CS-FBS blank and for (C) m/z 414 → 272 and (D) m/z 414 → 350 of a CS-FBS sample spiked at 10 pg/mL are shown. The signal-to-noise ratios for the peaks representing the PS derivative of E2 at 17.8 min in (C) and (D) are 8.2 and 5.7, respectively.