巴西坚果中碲的总量及其体外生物可利用性。
Total content and in vitro bioaccessibility of tellurium in Brazil nuts.
机构信息
Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, 13083-970, Campinas, SP, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, 13083-970, Campinas, SP, Brazil.
Spectrometry, Sample Preparation and Mechanization Group - GEPAM, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, 13083-970, Campinas, SP, Brazil.
出版信息
J Trace Elem Med Biol. 2018 Jul;48:46-51. doi: 10.1016/j.jtemb.2018.02.026. Epub 2018 Mar 1.
Alongside the Brazil nut's role as an excellent source of vitamins, oil, fatty acids, lipids and nutrients, it is also recognized as a rich source of selenium. The pathway along which selenium and sulfur are metabolized in plants is theorized to be the same as that used for tellurium. Total tellurium content and its bioaccessibility are then evaluated by ICP-MS. Interferences and sample preparation are evaluated for the accurate determination of tellurium, and the accuracy determined through analysis of the certified reference material 1643e. A concentration of 4.02 ± 0.391 ng g is obtained as an average concentration through external and internal calibrations. Through this reliable result, tellurium bioaccessibility in Brazil nuts is obtained via an in vitro validated unified bioaccessibility method. Values of 32% and 30% of total tellurium are available in the gastric and gastrointestinal fractions, respectively.
除了作为维生素、油、脂肪酸、脂类和营养物质的极好来源外，巴西坚果还被认为是硒的丰富来源。硒和硫在植物中代谢的途径被理论上被认为与碲的代谢途径相同。然后通过 ICP-MS 来评估总碲含量及其生物可利用性。通过分析认证参考物质 1643e 来评估干扰和样品制备对碲的准确测定的影响，并确定准确性。通过外部和内部校准，获得了 4.02±0.391ng/g 的平均浓度。通过这一可靠的结果，通过体外验证的统一生物可利用性方法获得了巴西坚果中碲的生物可利用性。总碲的 32%和 30%分别存在于胃和胃肠道部分中。
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