地矿硫化物样品中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-MINERAL-005 Total Mercury in SulfideUsing Direct Mercury Analysis BACKGROUND Sulfide ores are an important source for the production of Ni， Co， Cu， Zn， Pb， Mo， Bi， and Sb. They contain not only the desired sulfides butalso significant amounts of mercuric sulfide (cinnabar) and other minerals， including minerals that do not contain metals. When rain falls onsulfide ore waste， sulfuric acid is produced. Sulfuric acid leaches out metals and chemicals from the waste and creates acid mine drainage，which contaminates lakes， rivers， and groundwater with mercury and mercury compounds. Fish and shellfish concentrate mercury in theirbodies， often in the form of methylmercury， a highly toxic organic compound of mercury. Species of fish that are long-lived and high on thefood chain contain higher concentrations of mercury from a process known as biomagnification. Mercury is known to also bioaccumulate inhumans， so bioaccumulation in seafood carries over into human populations where it can result in mercury poisoning. Mercury is danger-ous to both natural ecosystems and humans because it is highly toxic， especially due to 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 necessaryto accurately quantify total mercury in sulfide ores and ore waste. REFERENCES · WHO HP： http：//www.who.int/ipcs/assessment/public_health/mercury/en/ ·National Institute for Minamata Disease HP： http：//www.nimd.go.jp/archives/english/tenji/e_corner/etop.html ·Smirnov， V.1. Geologiia poleznykh iskopaemykh， 2nd ed. Moscow， 1969. · Sulfide Mining Overview： www.sosbluewaters.org/sulfide_mining_overview.pdf INSTRUMENT NIC MA-3000 is a dedicated direct mercury analyzer that selectively measures total mercury bythermal decomposition， gold amalgamation and cold vapor atomic absorption spectroscopy， onvirtually any sample matrix- solid， liquid， and gas. The MA-3000 offers quick results without anytedious， time-consuming and elaborate sample preparation process. It is a perfect solution totoday's increasing laboratory demand for easy， fast and accurate mercury measurements. MA-3000直接燃烧法在地矿行业测定硫化物中总汞的应用硫化矿是生产镍、钴、铜、锌、铅、钼、铋和锑的重要来源。它们不仅含有所需的硫化物，而且含有大量的硫化汞（朱砂）和其他矿物质，包括不含金属的矿物质。当雨水落在硫化矿废料上时，就会产生硫酸。硫酸从废物中浸出金属和化学物质，并产生酸性矿井排水，从而用汞和汞化合物污染湖泊、河流和地下水。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。寿命长且位于食物链较高位置的鱼类物种含有较高浓度的汞，这些汞来自一种称为生物放大的过程。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，为防止汞中毒，有必要准确量化硫化矿石和矿石废料中的总汞含量。 NIC公司 MA-3000是一款专用的直接汞分析仪，通过热分解、金汞齐化和冷原子吸收光谱有选择地测量几乎任何样品基质(固体、液体和气体)的总汞。MA-3000提供快速测试的结果，没有任何繁琐、耗时和复杂的样品制备过程。这是一个理想的解决方案，以满足当今实验室对简单，快速和准确的汞测量的需求。