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As an alternative to the classical approach of combining strong cation exchange SCX-LC and RP-LC for the separation of complex proteomic samples, this essay describes the online comprehensive RP-LCxRP-LC separation of BSA and human blood serum. High orthogonality and peak capacity are achieved through the application of a significantly different pH in the two dimensions. The coupling of fused-core columns in series ensures high efficiency in the first dimension, while a previously designed interface with parallel second dimension columns further enhances the separation capability of the comprehensive system.
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François et al. (2009) studied this question.
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