Maggi Chiara, Berducci Maria Teresa, Bianchi Jessica, Giani Michele, Campanella Luigi
Advanced Institute for Environmental Protection and Research-ISPRA, Via di Casalotti 300, Rome, Italy.
Anal Chim Acta. 2009 May 8;641(1-2):32-6. doi: 10.1016/j.aca.2009.03.033. Epub 2009 Mar 25.
An analytical method for simple and rapid determination of methylmercury in sediment and organism samples is described. The proposed method employs the oxygen combustion-gold amalgamation using Direct Mercury Analyser (DMA-80) after complete removal of MeHg by organic extraction and back extraction to an aqueous medium. DMA-80 instrument is equally suitable for the analysis of solid and liquid materials and has a good detection limit. The analytical performance of this method was evaluated by analysis of certified reference materials (CRM-580, IAEA-405, DORM-2, DOLT-3, SRM-2976 and SRM-2977) assessing its quality in terms of accuracy, repeatability and quantification limit. Furthermore total mercury and methylmercury have been analysed in sediment and organism samples collected during the XXI Italian Antarctic Expedition in Terra Nova Bay (Ross Sea, Northern Victoria Land). The results obtained show the validity of the proposed method as ready-to-use analytical method to analyse real samples.
本文描述了一种用于简单快速测定沉积物和生物样品中甲基汞的分析方法。该方法采用氧燃烧-金汞齐化法，使用直接测汞仪（DMA-80），通过有机萃取和反萃取将甲基汞完全去除至水介质后进行分析。DMA-80仪器同样适用于固体和液体材料的分析，且具有良好的检测限。通过分析有证标准物质（CRM-580、IAEA-405、DORM-2、DOLT-3、SRM-2976和SRM-2977）评估该方法在准确性、重复性和定量限方面的质量，以此对该方法的分析性能进行评价。此外，还对在第21次意大利南极考察期间于特拉诺瓦湾（罗斯海，北维多利亚地）采集的沉积物和生物样品中的总汞和甲基汞进行了分析。所得结果表明该方法作为一种现成的分析真实样品的分析方法是有效的。
