Loppi Stefano, Faleri Claudia, Paoli Luca
Department of Life Sciences, University of Siena, Via Mattioli 4, I-53100, Siena, Italy,
Bull Environ Contam Toxicol. 2014 Sep;93(3):350-3. doi: 10.1007/s00128-014-1327-1. Epub 2014 Jul 10.
In this paper we investigated whether a different accuracy in sample cleaning prior to the analysis may affect the elemental composition of unwashed samples of the lichen Xanthoria parietina. To this purpose, samples of this lichen were collected from a remote area of Sardinia (Italy) and randomly divided into two aliquots, one cleaned very carefully (ca. 3-4 h to obtain ca. 200 mg of material for analysis) and the other cleaned with a lower efficiency (ca. 1-2 h). Samples were analysed by ICP-MS for the content of Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Ni, Pb, V and Zn. The results indicated that an accurate cleaning is effective for reducing the content of Al and Fe, i.e. soil-related elements, but that it has no effect on the concentrations of other elements less represented in the soil.
在本文中，我们研究了分析前样品清洗的不同精度是否会影响未清洗的地衣石黄衣样品的元素组成。为此，从意大利撒丁岛的一个偏远地区采集了这种地衣的样品，并随机分成两份，一份非常仔细地清洗（约3 - 4小时，以获得约200毫克用于分析的材料），另一份清洗效率较低（约1 - 2小时）。通过电感耦合等离子体质谱法（ICP-MS）分析样品中铝（Al）、砷（As）、钡（Ba）、钙（Ca）、镉（Cd）、钴（Co）、铬（Cr）、铜（Cu）、铁（Fe）、钾（K）、镁（Mg）、锰（Mn）、镍（Ni）、铅（Pb）、钒（V）和锌（Zn）的含量。结果表明，精确清洗对于降低铝和铁（即与土壤相关的元素）的含量是有效的，但对土壤中含量较少的其他元素的浓度没有影响。
