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Molecularly imprinted polymers as synthetic receptors for the QCM-D-based detection of l-nicotine in diluted saliva and urine samples

Lookup NU author(s): Dr Marloes PeetersORCiD

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Abstract

Molecularly imprinted polymers (MIPs) are synthetic receptors that are able to specifically bind their target molecules in complex samples, making them a versatile tool in biosensor technology. The combination of MIPs as a recognition element with quartz crystal microbalances (QCM-D with dissipation monitoring) gives a straightforward and sensitive device, which can simultaneously measure frequency and dissipation changes. In this work, bulk-polymerized l-nicotine MIPs were used to test the feasibility of l-nicotine detection in saliva and urine samples. First, l-nicotine-spiked saliva and urine were measured after dilution in demineralized water and 0.1× phosphate-buffered saline solution for proof-of-concept purposes. l-nicotine could indeed be detected specifically in the biologically relevant micromolar concentration range. After successfully testing on spiked samples, saliva was analyzed, which was collected during chewing of either nicotine tablets with different concentrations or of smokeless tobacco. The MIPs in combination with QCM-D were able to distinguish clearly between these samples: This proves the functioning of the concept with saliva, which mediates the oral uptake of nicotine as an alternative to the consumption of cigarettes. [Figure not available: see fulltext.] © 2013 Springer-Verlag Berlin Heidelberg.


Publication metadata

Author(s): Alenus J, Ethirajan A, Horemans F, Weustenraed A, Csipai P, Gruber J, Peeters M, Cleij TJ, Wagner P

Publication type: Article

Publication status: Published

Journal: Analytical and Bioanalytical Chemistry

Year: 2013

Volume: 405

Issue: 20

Pages: 6479-6487

Print publication date: 01/08/2013

Online publication date: 11/06/2013

ISSN (print): 1618-2642

ISSN (electronic): 1618-2650

Publisher: Springer

URL: https://doi.org/10.1007/s00216-013-7080-1

DOI: 10.1007/s00216-013-7080-1

PubMed id: 23754330


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