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- W2509722425 abstract "A magnetic solid-phase extraction (MSPE) protocol prior to HPLC was developed for the extraction and determination of Allura Red in food samples. Magnetic nanoparticles were coated with tetraethylorthosilicate and 3-aminopropyltriethoxysilane and modified by graphene. Scanning electron microscopy, transmission electron microscopy and Fourier-transform infrared spectrometry were used to characterise the graphene-functionalised sorbents; and the main parameters affecting the extraction such as sample volume, temperature, pH and time were investigated and established. Under optimised conditions, the pre-concentration factor of Allura Red was 200, and the calibration curve was linear at a concentration range of 5–1500 μg kg−1. The LOD was 2 μg kg−1, the limit of quantification was 7 μg kg−1, and the relative standard deviation was 3.3%. The prepared MSPE procedure was simple and fast, and it was successfully applied for the determination of Allura Red in beverages, candy and jelly." @default.
- W2509722425 created "2016-09-16" @default.
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- W2509722425 date "2016-09-19" @default.
- W2509722425 modified "2023-09-23" @default.
- W2509722425 title "Magnetic solid-phase extraction coupled with HPLC for the determination of Allura Red in food and beverage samples" @default.
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- W2509722425 doi "https://doi.org/10.1080/19440049.2016.1231937" @default.
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