金枪鱼，鱼中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-FOOD-004 Total Mercury in Shark Liver Oil Using Direct Mercury Analysis BACKGROUND Shark liver oil has been used for centuries as a folk remedy to promote the healing of wounds and for respiratory tract and digestive systemproblems. It continues to be promoted worldwide as a dietary supplement for the treatment of a variety of diseases. A recent study of tigersharks from the coast of Ishigaki Island， Japan found a rapid increase in hepatic Hg concentration concurrent with the onset of maturity insharks that may arise from the continuous intake of Hg via their food， and also the slower growth of mature sharks. Bioaccumulation in sharkliver oil carries over into human populations， where it can result in mercury poisoning. Mercury is highly toxic to humans， especially becauseof its ability to damage the central nervous system. Mercury poses a particular threat to human development in utero and in early childhood.Thus， to prevent mercury poisoning， it is necessary to accurately quantify total mercury in shark liver oil supplements. REFERENCES ·WHO HP： · UNEP HP， MINAMATA CONVENTION ON MERCURY： ·FDAHP： ·Wiki： · PubMed： Mar Pollut Bull. 2008 Oct；56(10)：1774-80. doi： 10.1016 INSTRUMENT NIC MA-3000 is a dedicated direct mercury analyzer that selectively measures totalmercury by thermal decomposition， gold amalgamation and cold vapor atomic absorptionspectroscopy， on virtually any sample matrix- solid， liquid， and gas. The MA-3000 offersquick results without any tedious， time-consuming and elaborate sample preparationprocess. It is a perfect solution to today's increasing laboratory demand for easy， fast andaccurate mercury measurements. MA-3000直接燃烧法在食品行业测定金枪鱼中总汞的应用 鱼类和贝类体内的汞通常以甲基汞的形式浓缩，甲基汞是一种剧毒的有机汞化合物。鱼类产品已被证明含有来自水污染的不同数量的汞。寿命长且在食物链上位居前列的鱼类物种，例如金枪鱼，其汞含量高于寿命短的小型鱼类。这是因为当捕食者鱼吃较小的鱼时，捕食者会在称为生物放大的过程中吸收猎物的汞污染。众所周知，汞也会在人体中进行生物积累，因此海产品中的生物积累会传染给人类，从而导致汞中毒。汞对自然生态系统和人类都是危险的，因为它具有剧毒，特别是因为它能够破坏中枢神经系统。汞对子宫内和儿童早期的人类发展构成特别威胁。因此，为了防止汞中毒，有必要准确量化金枪鱼和其他长寿命鱼类的总汞含量。 仪器NIC MA-3000是一款专用的直接汞分析仪，可通过热分解、金汞齐和冷蒸汽原子吸收光谱法选择性地测量全汞，几乎适用于任何样品基质-固体、液体和气体。MA-3000提供快速的结果，不需要任何繁琐、耗时和复杂的样品制备过程。这是一个完美的解决方案，今天的实验室日益增加的需求，方便，快速和准确的汞测量