期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 130, 期 -, 页码 53-59出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2017.02.008
关键词
Placenta; TXRF; Multielemental analysis; Slurry; Suspension; Synchrotron
类别
资金
- Spanish National Research Programme [CGL2013-48802-C3-2-R]
- IAEA Research within the framework of the Coordinated Research Project - IAEA [18243, CRP-G42005]
- Office of Graduate Studies and Research at the University of the West Indies, Mona
In the present contribution, benchtop total reflection X-ray fluorescence spectrometry (TXRF) has been evaluated as a cost-effective multielemental analytical technique for human placenta analysis. An easy and rapid sample preparation consisting of suspending 50 mg of sample in 1 mL of a Triton I% solution in deionized water showed to be the most suitable for this kind of samples. However, for comparison purposes, an acidic microwave acidic digestion procedure was also applied. For both sample treatment methodologies, limits of detection for most elements were in the low mg/kg level. Accurate and precise results were obtained using internal standardization as quantification approach and applying a correction factor to compensate for absorption effects. The correction factor was based on the proportional ratio between the slurry preparation results and those obtained for the analysis of a set of human placenta samples analysed by microwave acidic digestion and ICP-AES analysis. As a study case, the developed TXRF methodology was applied for multielemental analysis (K, Ca, Fe, Cu, Zn, As, Se, Br, Rb and Sr) of several healthy women's placenta samples from two regions in Jamaica. (C) 2017 Elsevier BY. All rights reserved.
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