地质样品、矿产品中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-MINERAL-003 BACKGROUND Mercury occurs in elemental form as a natural amalgam in native metals like copper. Most copper ores contain only a small percentage ofcopper metal bound within valuable ore minerals， with the remainder of the ore being gangue (unwanted minerals). The ore is first crushed(comminution) and the resulting particles of individual mineral phases are separated to remove gangue，which is where mercury rich tailingscan enter the local watershed. Mercury vapor can also be released into the atmosphere during the smelting process， where the ore is heatedand reduced to remove other elements as gases or slags. Although elemental mercury is only present in the atmosphere in trace amounts，this has been established as a significant source of mercury for aquatic environments. Mercury is known to bioaccumulate in humans， so bioaccumulation in marine life carries over into human populations where it can resultin mercury poisoning. Mercury is dangerous to both natural ecosystems and humans because it is highly toxic， especially due to its abilityto damage the central nervous system. Mercury poses a particular threat to human development in utero and in early childhood. Thus， toprevent mercury poisoning， it is necessary to accurately quantify total mercury in copper ore. REFERENCES · WHO HP： http：//www.who.int/ipcs/assessment/public_health/mercury/en/ · National Institute for Minamata Disease HP：ahttp：//www.nimd.go.jp/archives/english/tenji/e_corner/etop.html ·Wiki： https：//en.wikipedia.org/wiki/Copper_extraction · GeoScienceWorld： http：//geea.geoscienceworld.org/content/2/2/185 INSTRUMENT NIC MA-3000 is a dedicated direct mercury analyzer that selectively measures total mercury by thermal decomposition， gold amalgamationand cold vapor atomic absorption spectroscopy， on virtually any sample matrix- solid， liquid， and gas. The MA-3000 offers quick resultswithout any tedious， time-consuming and elaborate sample preparation process. It is a perfect solution to today's increasing laboratorydemand for easy， fast and accurate mercury measurements. MA-3000直接燃烧法在地矿行业测定铜矿中总汞的应用汞以元素形式作为天然汞齐存在于铜等天然金属中。大多数铜矿石仅包含一小部分结合在有价值矿石矿物中的铜金属，其余矿石为脉石（不需要的矿物）。矿石首先被压碎（粉碎），所产生的各个矿物相颗粒被分离以去除脉石，这是富含汞的尾矿可以进入当地分水岭的地方。汞蒸气也可以在冶炼过程中释放到大气中，在该过程中矿石被加热和还原，以去除气体或炉渣等其他元素。尽管元素汞仅以痕量存在于大气中，但这已被确定为水生环境中汞的重要来源。众所周知，汞会在人类中生物蓄积，因此海洋生物中的生物蓄积会转移到人类群体中，从而导致在汞中毒中。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，必须准确量化铜矿石中的总汞含量。 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。