采用 ICP-OES 和 GF-AAS 法评价猫爪茶中的无机元素。
Evaluation of inorganic elements in cat's claw teas using ICP OES and GF AAS.
机构信息
Group of Analytical Spectrometry Applied, Faculty of Chemistry, Federal University of Pará, 66075-110 Belém, Pará, Brazil.
Group of Analytical Spectrometry Applied, Faculty of Chemistry, Federal University of Pará, 66075-110 Belém, Pará, Brazil.
出版信息
Food Chem. 2016 Apr 1;196:331-7. doi: 10.1016/j.foodchem.2015.09.057. Epub 2015 Sep 16.
The determination of Ba, Ca, Cu, Fe, Mg, Mn, P, Pb, and Zn by inductively coupled plasma optical emission spectrometry (ICP OES), and Se by graphite furnace atomic absorption spectrometry (GF AAS), has been carried out in dry matter and teas from 11 samples of the cat's claw plant. The accuracy and precision values were verified against GBW 07604 (Poplar leaves) certified reference material and by the recovery test. Results showed a high content of Ca in the medicinal plant studied, followed by Mg and P. The values obtained showed that the elements studied have different concentrations depending on the method of tea preparation. The highest levels were observed in Ca and Mg, and the lowest for Se and Pb, by both infusion and decoction. Teas prepared from this plant were found to be at safe levels for human consumption, and may be suitable as sources of these elements in the human diet.
采用电感耦合等离子体发射光谱法（ICP-OES）测定了 11 份猫爪草干物质和茶中的 Ba、Ca、Cu、Fe、Mg、Mn、P、Pb 和 Zn，采用石墨炉原子吸收光谱法（GF-AAS）测定了 Se。通过与 GBW 07604（杨树叶）标准参考物质的比较和回收试验对准确性和精密度进行了验证。结果表明，药用植物中 Ca 含量较高，其次是 Mg 和 P。研究表明，不同的茶叶制备方法导致了元素浓度的不同。通过浸泡和煎煮两种方法都发现，Ca 和 Mg 的含量最高，而 Se 和 Pb 的含量最低。该植物制成的茶对人体消费是安全的，并且可能是这些元素在人类饮食中的合适来源。
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