Abstract
Determination of minerals is important for quality control of animal foods and sample preparation is a critical step to obtain fast, accurate, and reliable results. Extraction using dilute acid solutions is an interesting alternative due to its simplicity, softness, and safety. However, most extraction procedures are performed in batch mode, which generally is more time consuming, laborious, and susceptible to errors than those made either in flow or in flow-batch mode. We evaluated here a flow-batch extraction system for on-line determination of minerals in dried animal foods by inductively coupled plasma optical emission spectrometry (ICP OES). The designed flow-batch extraction system allowed fast, simple, and reliable on-line determination of minerals in dried animal foods by ICP OES. Moreover, it is inexpensive and simple to build, which makes its application feasible in routine analysis. The optimized extraction condition was performed using 50 mg of dried animal tissue sample, 10 mL of 4% V V−1 HCl, and 4 min of extraction time. The accuracy of the flow-batch extraction procedure was demonstrated using certified reference materials of bovine liver.
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Acknowledgements
The authors are also grateful to Analítica (Brazil), Bergh of (Germany), and Thermo-Scientific (USA) for instrumental support and Prof. Dr. Elisabete Aparecida Nadai Fernandes and Ph.D. Márcio Arruda Bacchi of Centro de Energia Nuclear na Agricultura, Universidade de São Paulo (Piracicaba, São Paulo, Brazil) for determining particle size distribution of samples.
Funding
The authors acknowledge support from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil, fellowships 140474/2013-7 PPGQ-UFSCar provided to T.L.M. and research support provided to J.A.N. by grant 303107/2013-8).
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Thiago Linhares Marques declares that he has no conflict of interest. Joaquim Araújo Nóbrega declares that he has no conflict of interest.
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Marques, T.L., Nóbrega, J.A. Application of a Flow-Batch Extraction System for On-Line Determination of Minerals in Animal Foods by Inductively Coupled Plasma Optical Emission Spectrometry. Food Anal. Methods 11, 1243–1249 (2018). https://doi.org/10.1007/s12161-017-1112-y
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DOI: https://doi.org/10.1007/s12161-017-1112-y