ArticleJournal of food and drug analysis2026
An optical fiber caffeine sensor using a molecularly imprinted polymethacrylic acid membrane coated on optical fiber surface as a transducer.
Article in Journal of food and drug analysis, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
Caffeine is a neurotransmitter, important to human health. This compound exists in many food products, has been added to soft drinks, pharmaceutical drugs. For many applications, a field deployable technique for quick detecting caffeine is attractive. In this paper, we report a selective optical fiber caffeine sensor using a molecularly imprinted polymer (MIP) membrane as a transducer. The membrane extracts/concentrate caffeine from sample solutions significantly improved sensor's sensitivity with a 95 times sensitivity improvement. The sensor achieved a detection limit of 2.0 μg/mL. This sensor was used to directly analyze caffeine in soft drink products without interference from sample matrix.
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