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. 2015 Aug 25;7(6):1036–1044. doi: 10.1080/19420862.2015.1083665

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© 2015 The Author(s). Published with license by Taylor & Francis

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted.

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Figure 3. — Instrument configuration schematic. (A) A column manager housing two 6-port 2-position valves was configured as illustrated by the schematic to perform heart-cuts of the 1^st dimension separation. Valve position is denoted numerically as position 1 and 2. Abbreviations are defined as QSM: quaternary solvent manager, AS: auto sampler, TUV: tunable ultraviolet detector, BSM: binary solvent manager, RP: regenerative pump, MS: mass spectrometer. (B) Heart-cuts were performed in 0.2 minute intervals at or near the apex of the peak under investigation. An example of the heart-cut being performed on peak (C) from Figure 5c is illustrated in the example. The heart-cut was bracketed with a 3 second interval to purge residual ammonium sulfate in the fluidic path post 1^st dimension column.