煤中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-MINERAL-001 BACKGROUND Since mercury occurs naturally in coal and other fossil fuels， when these fuels are burned for energy， the mercury becomes volatilized andairborne into the atmosphere. In the United States， power plants that burn coal to create electricity account for about half of all man-mademercury emissions. In nature， elemental mercury can go through a series of chemical transformations that convert it to highly toxic formsthat are concentrated in fish and birds. The most toxic form of mercury is methylmercury， an organic form created by a complex bacterialconversion of inorganic mercury. Mercury from the food chain is known to bioaccumulate in humans， so bioaccumulation in fish and birdscarries over into human populations， where it can result in mercury poisoning. Mercury is dangerous to both natural ecosystems and humansbecause it is highly toxic， especially because of its ability to damage the central nervous system. Mercury poses a particular threat to humandevelopment in utero and in early childhood. Thus， to prevent mercury poisoning， it is necessary to accurately quantify total mercury in coalso that mercury emissions into the atmosphere may be carefully controlled. REFERENCES · WHO HP： http：//www.who.int/ipcs/assessment/public_health/mercury/en/ · US EPA： https：//www.epa.gov/air-emissions-inventories/2011-national-emissions-inventory-nei-technical-support-document·USGS： https：//pubs.usgs.gov/fs/fs095-01/fs095-01.html 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， fastand accurate mercury measurements. MA-3000直接燃烧法在地矿行业测定煤炭中总汞的应用由于汞自然存在于煤和其他化石燃料中，当这些燃料燃烧以获取能量时，汞会挥发并通过空气传播到大气中。在美国，燃煤发电的发电厂约占所有人造汞排放量的一半。在自然界中，元素汞可以经过一系列化学转化，将其转化为剧毒形式，并集中在鱼类和鸟类中。汞的毒性最强的形式是甲基汞，这是一种有机形式，由无机汞的复杂细菌转化产生。众所周知，食物链中的汞会在人类体内进行生物积累，因此鱼类和鸟类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，必须准确量化煤中的总汞含量，以便仔细控制向大气中的汞排放。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。