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. Author manuscript; available in PMC: 2011 Jun 7.
Published in final edited form as: Anal Methods. 2011 Jan 1;3(2):420–428. doi: 10.1039/C0AY00714E

Fig. 3.

Fig. 3

SRM chromatogram of the online-SPE-LC-MS/MS system. The SRM signals of DFC (black line) and I.S. (grey line) following an injection of 20 μl of standard solution containing 15 nM DFC and 25 nM I.S. is shown.