大气、环境空气中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-ENV-002 Total Mercury in Collection Tube(Atmospheric Air) UsingDirectMercury Analysis BACKGROUND Atmospheric elemental mercury (Hg)， although present only in trace amounts， has been established as a significant source of Hg to aquaticenvironments. Mercury and most of its derivative compounds are metabolic poisons that bioaccumulate in aquatic food chains，ultimatelyreaching concentrations capable of causing neurological and reproductive damage in terrestrial as well as aquatic organisms. Atmosphericmercury deposition has also led to accumulation in forest soils. Major sources include combustion processes， including incineration ofmedical waste， municipal waste， sewage sludge， and hazardous waste. In addition， the burning of fossil fuels and a wide range ofmanufacturing processes， like metals production， mining， refining and cement production， contribute to the problem. Mercury is known toalso bioaccumulate in humans， so bioaccumulation in the aquatic food chain carries over into human populations， where it poses a particularthreat to development in utero and in early childhood due to profound central nervous system damage. Thus， to prevent mercury poisoning，it is necessary to accurately quantify total mercury vapor in the atmosphere. REFERENCES · WHOHP： · UNEP HP， MINAMATA CONVENTION ON MERCURY： · US EPA： · EU： lNSTRUMENT-MA-3000 AND RH-MA (OPTIONAL UNIT) 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. 大气元素汞 (Hg) 尽管仅以痕量存在，但已被确定为水生环境中汞的重要来源。汞及其大部分衍生化合物是代谢毒物，会在水生食物链中生物累积，最终达到能够对陆地和水生生物造成神经和生殖损害的浓度。大气中的汞沉积也导致了森林土壤中的汞积累。主要来源包括燃烧过程，包括医疗废物、城市废物、污水污泥和危险废物的焚烧。此外，化石燃料的燃烧和广泛的制造过程，如金属生产、采矿、精炼和水泥生产，都会导致这个问题。众所周知，汞也会在人类中进行生物积累，因此水生食物链中的生物积累会影响到人类群体，由于严重的中枢神经系统损伤，它对子宫内和儿童早期的发育构成特别威胁。因此，为防止汞中毒，必须准确量化大气中的总汞蒸气。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。