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- W2885207965 abstract "Summary Excessively intaking caffeine can harm human health, and it is imperative to develop a rapid method to identify caffeine for food safety. The magnetic molecularly imprinted polymeric microspheres ( MMIP s) were prepared to pretreat samples before silver nanoparticles (Ag NP s) colorimetric detection of caffeine. Using Fe 3 O 4 as supporting core, mesoporous SiO 2 as intermediate shell, α‐methylacrylic acid as functional monomer and caffeine as template, the prepared MMIP s were characterised by transmission electron microscopy, Fourier transform infrared spectroscopy and vibrating sample magnetometer. Adsorption process followed Langmuir adsorption isotherm with maximum adsorption capacity at 38.8 mg g −1 under 298 K. The MMIP s extract caffeine from beverages, then the Ag NP s colorimetric method rapidly screened and semi‐quantified caffeine ≥5 mg L −1 by naked eye, and accurately quantified caffeine ranging 0.1–5 mg L −1 by UV ‐vis spectroscopy at 393 nm, which were consistent with HPLC analytical results. Thus, this method might be used to rapidly enrich and analyse caffeine in beverages." @default.
- W2885207965 created "2018-08-22" @default.
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- W2885207965 date "2018-08-17" @default.
- W2885207965 modified "2023-10-12" @default.
- W2885207965 title "Rapidly colorimetric detection of caffeine in beverages by silver nanoparticle sensors coupled with magnetic molecularly imprinted polymeric microspheres" @default.
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- W2885207965 doi "https://doi.org/10.1111/ijfs.13924" @default.
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