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Journal Publication

A label-free detector for liquid chromatography systems using mm-wave technology: First proof of concept

This publication appears in: Journal of Chromatography A

Authors: Y. Zhang, S. Declerck, D. Mangelings, G. He, V. Matvejev, Y. Vander Heyden and J. Stiens

Volume: 1516

Pages: 79-88

Publication Year: 2017


Abstract:

The development of millimeter-wave (mm-wave) technology has enabled the study of bio-molecular interactions by means of electromagnetic waves with frequencies between 30 and 300 GHz. In this study, an attempt has been made to exploit the possibility of mm-wave technology as alternative detectiontechnique for liquid chromatographic (LC) systems. The goal is to design and fabricate a label-free mmwave detector that is compatible with LC systems. As proof-of-concept experiments, the UV absorbing compounds praziquantel and trans-stilbene-oxide as well as a non-UV absorbing compound sorbitol areinjected in an open capillary as well as a capillary with stationary phase and measured by both mm-wave and UV detectors. The in-house developed mm-wave detector is capable of detecting all compounds without the need for labelling. Although the detection limit of such detector still needs to be verified and occasionally improved in the future, it already shows great potential as an additional detection technique for LC systems.for LC systems.

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Mr. Guoqiang He

+32 (0)02 629 239

ghe@etrovub.be

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Prof. Dr. Ir. Johan Stiens

+32 (0)02 629 239

jstiens@etrovub.be

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