Departamento de Química Analítica y Alimentaria, Área de Química Analítica, Facultad de Química, Universidad de Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo, Spain.
Food Chem. 2013 May 1;138(1):234-41. doi: 10.1016/j.foodchem.2012.09.105. Epub 2012 Nov 8.
Fast and reliable analytical methodologies are required for quality control of plants in order to assure human health. Ultrasound-assisted extraction in combination with total reflection X-ray fluorescence is proposed as a fast and simple method for multielemental analysis of plants on a routine basis. For this purpose, five certified reference materials have been analysed for the determination of P, K, Ca, Cr, Mn, Fe, Ni, Cu, Zn and Pb. Different extractant media (acids and oxidants) were tried. A mixture of diluted HNO(3)+HCl+HF, was selected as the best option for the achievement of complete extractions. Accurate and precise results can be reached in most cases along with a high sample throughput. Different plants (i.e., herbs, spices and medicinal plants) were analysed. Linear discriminant analysis together with the elemental concentrations allowed the differentiation of commercial preparations corresponding to flower, fruit and leaf.
为了确保人类健康，需要快速可靠的分析方法来控制植物的质量。超声辅助提取结合全反射 X 射线荧光被提议作为一种快速简单的方法，用于常规的植物多元素分析。为此，分析了五种经过认证的参考物质，以测定 P、K、Ca、Cr、Mn、Fe、Ni、Cu、Zn 和 Pb。尝试了不同的提取介质（酸和氧化剂）。选择稀释的 HNO(3)+HCl+HF 混合物作为实现完全提取的最佳选择。大多数情况下，可以达到准确和精密的结果，同时具有高的样品通量。分析了不同的植物（即草药、香料和药用植物）。线性判别分析结合元素浓度允许区分对应于花、果实和叶的商业制剂。
