Pino Anna, Alimonti Alessandro, Botrè Francesco, Minoia Claudio, Bocca Beatrice, Conti Marcelo E
Department of Environment and Primary Prevention, Istituto Superiore di Sanità, Rome, Italy.
Rapid Commun Mass Spectrom. 2007;21(12):1900-6. doi: 10.1002/rcm.3039.
A simple and efficient digestion method for rapid sample preparation and quantification of 25 chemical elements in lichens by sector field inductively coupled plasma mass spectrometry is described. A microwave (MW)-assisted acid digestion was carried out at atmospheric pressure simultaneously handling up to 80 samples in screw-capped disposable polystyrene tubes. This digestion procedure was compared with the established MW digestion in closed vessels in order to examine its potential applicability in routine analysis for environmental monitoring. Three certified reference materials, i.e. BCR 482 (lichens), BCR 62 (olive leaves) and BCR 100 (beech leaves), as well as a small set of real samples were analyzed. Limits of quantification, accuracy and precision of the method were assessed. The majority of the elements were totally recovered from the lichens and from the other vegetable matrices. Low contamination risk, simplicity, time-saving, and applicability in routine analyses make this method very suitable for use in extensive screening campaigns.
描述了一种简单高效的消解方法，用于通过扇形场电感耦合等离子体质谱法快速制备地衣样品并对其中的25种化学元素进行定量分析。采用微波（MW）辅助酸消解，在大气压下于带螺旋盖的一次性聚苯乙烯管中同时处理多达80个样品。将该消解程序与在密闭容器中进行的既定微波消解进行比较，以检验其在环境监测常规分析中的潜在适用性。分析了三种有证标准物质，即BCR 482（地衣）、BCR 62（橄榄叶）和BCR 100（山毛榉叶），以及一小批实际样品。评估了该方法的定量限、准确度和精密度。大多数元素能从地衣和其他植物基质中完全回收。低污染风险、操作简单、节省时间以及在常规分析中的适用性使得该方法非常适合用于大规模筛查活动。
