39 research outputs found
Parameter, die die Trennung von Pd-β-Diketonaten bei der SFC mit gepackten Säulen beeinflussen
Negative Temperaturgradienten zur Dichteprogrammierung bei der Chromatographie mit überkritischen fluiden Phasen
HPLC-SIMS Off-line Kopplung zur Bestimmung von 8-Hydroxychinolaten und einigen anderen Metallchelaten
Electroosmotic flow patterning using microfluidic delay loops
A theoretical and experimental investigation of alternating electroosmotic flow patterns by means of specially designed delay loops is presented. Using elementary methods of compact network modeling and detailed FEM simulations the flow behavior and, in particular, the rearrangement of sample plugs is modeled. The proposed designs rely on flow splitting in combination with electroosmotic delay loops leading to a runtime difference or phase shift between two sub-streams. Due to this phase shift, a new fluid interface is generated at the merging point. The approach is experimentally validated by injection of a Rhodamine 6G solution into an aqueous sodium tetraborate buffer