Programmable selectivity, with tandem

Tunable/Programmable Selectivity with Tandem Capillary Columns... 

The limitation of tunable and programmable selectivity with tandem capillary columns using electronic pressure control at the column junction point is that changing the junction point pressure results in a change in the ensemble elution pattern for the entire mixture or a subgroup of the mixture, and under optimal conditions, any pressure change used to enhance the resolution of one component pair will degrade the resolution of another component pair. 

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