Application of Tb4O7 Nanoparticles for Lasalocid and Salicylate Determination in Food Analysis
The usefulness of Tb4O7 nanoparticles (NPs) as analytical reagents using sensitized luminescence as a detection system is described for the first time, and the results obtained are compared with those obtained using Tb(III) ions. Two drugs used in veterinary practice, namely, lasalocid (LAS) and salicylate (SAL), have been chosen as model analytes to carry out this study. The experimental conditions for these systems have been optimized, and their analytical features were obtained. The detection limits obtained for LAS and SAL using Tb4O7 NPs were 1.0 and 4.0 ng mL–1, respectively, which were comparable to those obtained using Tb(III) ions: 1.8 and 1.0 ng mL–1, respectively. However, precision data, with relative standard deviation values in the range 2.3–3.8% using the NPs and 3.5–6.5% using Tb(III) ions, were slightly better for LAS with Tb4O7 NPs. The practical analytical usefulness of Tb4O7 NPs as luminescent reagents has been shown by performing the determination of LAS in tap water, feed premix, and...
María Luisa Castillo-García; María Paz Aguilar-Caballos; Agustina Gómez-Hens
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