Quantitative Online Detection of Low‐Concentrated Drugs via a SERS Microfluidic System
- 13 December 2007
- journal article
- research article
- Published by Wiley in Chemphyschem
- Vol. 8 (18), 2665-2670
- https://doi.org/10.1002/cphc.200700554
Abstract
Herein, quantitative online monitoring of concentration fluctuations of different interesting drugs, namely, the phenothiazine promethazine as well as the anti-cancer agent mitoxantrone via surface enhanced Raman scattering assay based on a microfluidic device is demonstrated. With the applied liquid/liquid two-phase-segmented flow system we succeed in preventing the adhesion of nanoparticle aggregates to the channel walls which is necessary for a quantitative analysis. Even after repeated cycles no carry-over due to sedimentation of colloid particles is observed. To the best of our knowledge these are the first measurements applying a combination of a microfluidic device with SERS detection for quantitative online monitoring of fluctuations in drug concentrations over hours without use of aggressive chemicals for rinsing the chip surfaces prior to each measurement.Keywords
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