Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil.
Biol Trace Elem Res. 2011 Dec;144(1-3):1197-204. doi: 10.1007/s12011-011-9056-3. Epub 2011 Apr 13.
Yerba mate (Ilex paraguariensis), a widely consumed beverage in South America, contains various biochemically active substances, among them are several minerals. This paper reports on the results of a survey of trace elements in the yerba mate infusions. Three different commercially available trademarks of I. paraguariensis were evaluated, simulating the popular mode of preparation. Atomic absorption analyses for cadmium, lead, copper, zinc, aluminum, iron, chromium, manganese, molybdenum, and silver were performed using a graphite furnace. The levels ranged from 0.03 to 0.06 mg/L for copper, from 0.41 to 1.0 mg/L for zinc, from 0.32 to 1.7 mg/L for aluminum, from 0.12 to 0.23 mg/L for iron, from 2.3 to 7.0 mg/L for manganese, and from 0.01 to 0.03 mg/L for silver. The levels of chromium did not exceed 0.005 mg/L, while molybdenum, cadmium, and lead were lower than <0.01 mg/L. Metal content in mate tea infusions depends on a number of factors, some of which are controllable and others not, but the differences among various sources are admissible. Trace elements in mate plants seem to be weakly bounded to the substrate. The concentration of biometals does not exceed the limits accepted by Brazilian and international legislation when available.
巴拉圭冬青（Ilex paraguariensis），一种在南美洲广泛饮用的饮料，含有各种生物活性物质，其中包括几种矿物质。本文报告了对马黛茶浸提液中微量元素的调查结果。评估了三种不同的市售 I. paraguariensis 商标，模拟了流行的制备方式。使用石墨炉进行原子吸收分析，用于测定镉、铅、铜、锌、铝、铁、铬、锰、钼和银。铜的含量范围为 0.03 至 0.06mg/L，锌的含量范围为 0.41 至 1.0mg/L，铝的含量范围为 0.32 至 1.7mg/L，铁的含量范围为 0.12 至 0.23mg/L，锰的含量范围为 2.3 至 7.0mg/L，银的含量范围为 0.01 至 0.03mg/L。铬的含量不超过 0.005mg/L，而钼、镉和铅的含量低于 <0.01mg/L。马黛茶浸提液中的金属含量取决于许多因素，其中一些是可控的，而另一些则不可控，但不同来源之间的差异是可以接受的。马黛植物中的微量元素与基质的结合较弱。生物金属的浓度在可用时不超过巴西和国际法规规定的允许限度。
