期刊
FOOD CHEMISTRY
卷 383, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.132590
关键词
Multielemental; Quantification; Foodstuff; Solid powder; Suspension; TXRF
资金
- MCIN/AEI/10.13039/501100011033 [Grant CEX2018-000794-S]
In this study, the potential of total reflection X-ray fluorescence (TXRF) instrumentation for analyzing major and trace elements in milk powder was evaluated. The findings showed that TXRF, with appropriate calibration approaches, can provide acceptable results for K, Ca, Fe, and Zn determination. However, for light elements such as P and Cl, only screening results can be obtained.
In this contribution, the analytical potential of total reflection X-ray fluorescence (TXRF) instrumentation has been evaluated for the determination of major and trace elements in milk powder. TXRF allows the possibility of direct analysis of solid suspensions without the need for a digestion process and therefore it can be a potential analytical candidate for simple and cost-effective analysis. A detailed study to select sample preparation and measurements conditions was carried out. Different quantification approaches (including internal standardization and empirical calibration) were also tested. Finally, the developed TXRF methods (W anode) were validated by a strict comparison with the data from the reference methods on a set of twenty-three samples using robust statistics. Results showed that acceptable results can be obtained for K, Ca, Fe and Zn determination if using adequate calibration approaches. Otherwise, only screening results can be obtained for light elements (P and Cl) in milk powder samples.
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