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. Author manuscript; available in PMC: 2011 Jun 25.
Published in final edited form as: J Chromatogr A. 2010 Apr 21;1217(26):4313–4327. doi: 10.1016/j.chroma.2010.04.039

Fig. 2.

Fig. 2

A contour plot of the LC×LC chromatogram provided by Stoll et al. [9]. Peaks 1 through 6 are the standards identified in the text. The colorbar units are in milliabsorbance units (mAU) measured at a wavelength of 220 nm.