Figure 2
From: Optimization for peptide sample preparation for urine peptidomics
Comparison of representative chromatograms for SPE and mSPE. (A) The LC chromatogram from the SPE method contains a large region of low intensity peaks presumably due to the ionization suppression effect from the contaminating species. (B) The LC chromatogram from the mSPE method displays well-distributed peaks throughout the LC span.