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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Arsenic species extraction of biological marine samples (Periwinkles, Littorina littorea) from a highly contaminated site
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Arsenic species extraction of biological marine samples (Periwinkles, Littorina littorea) from a highly contaminated site

机译：从高度污染的地点提取生物海洋样品（荔枝角，立陶宛立陶宛）中的砷物质

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摘要

Arsenic is ubiquitous in the tissues of marine organisms and in uncontaminated environments it is dominantly present as the highly soluble and easily extractable non-toxic arsenical, arsenobetaine. However in contaminated environments, higher proportions of inorganic arsenic, which is much less soluble, are accumulated into the tissues of marine organisms, resulting in lower extraction efficiencies (defined as the percent extracted arsenic of the total arsenic). This study carried out a comparative analysis between three different two-step arsenic extraction methods based on Foster et al. [27] from highly contaminated tissue of the marine periwinkle, Littorina littorea. The first extraction step used 100% water, 1:1 methanol-water, or a 9:1 methanol-water as the extraction solvent and the second step consisted of a gently heated dilute nitric acid extraction. The optimized two step extraction method was 1:1 methanol-water extraction followed by a 2% HNO _3 extraction, based on maximum amounts of extracted species, including organoarsenic species.
机译：砷在海洋生物的组织中无处不在，在未受污染的环境中，砷主要以高溶解性和易提取的无毒砷砷甜菜碱形式存在。但是，在受污染的环境中，溶解度低得多的无机砷的较高比例会累积到海洋生物的组织中，导致提取效率降低（定义为总砷中提取砷的百分比）。这项研究对基于Foster等人的三种不同的两步砷萃取方法进行了比较分析。 [27]来自海洋长春花，Littorina littorea的高度污染的组织。第一步萃取使用100％水，1：1甲醇-水或9：1甲醇-水作为萃取溶剂，第二步包括轻轻加热的稀硝酸萃取。优化的两步萃取方法是：以最大量的萃取物（包括有机砷物）为基础，以1：1甲醇-水萃取，再用2％HNO 3萃取。

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