沉积物中汞检测方案(测汞仪)

PAGE 1 Application Note APPN-MA-3000-ENV-003 Total Mercury in Sludge(Low-Flash-Point)Using Direct Mercury Analysis 手 13 BACKGROUND Sludge is a semi-solid slurry that is produced as sewage sludge from wastewater treatment processes or as a settled suspension obtainedfrom conventional drinking water treatment and numerous other industrial processes. The term is sometimes generically used to refer tosolids separated from suspension in a liquid. Sludge is typically a soup-like material containing significant quantities of interstitial water andis often contaminated with heavy metals including mercury. Rain runoff from sludge can introduce mercury directly into the aquatic environ-ment. Incineration of sludge releases Hg vapor into the air， which also enters the bio-amplified food chain via marine life. Mercury is known to bioaccumulate in humans， so bioaccumulation in seafood carries over into human populations where it can result inmercury poisoning. Mercury is dangerous to both natural ecosystems and humans because it is highly toxic， especially due to its ability todamage 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 sludges. 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 · Wiki： https：//en.wikipedia.org/wiki/Sludge · Water， Air and Soil Pollution： https：//link.springer.com/article/10.1007/BF01189780 INSTRUMENT MCMA-2990 NIC MA-3000 is a dedicated direct mercury analyzer that selectively measures total mercuryby thermal decomposition， gold amalgamation and cold vapor atomic absorption spectroscopy，on virtually any sample matrix- solid， liquid， and gas. The MA-3000 offers quick results withoutany tedious， time-consuming and elaborate sample preparation process. It is a perfect solutionto today's increasing laboratory demand for easy， fast and accurate mercury measurements. HJ 923-2017，EPA 7473MA-3000直接燃烧法在环保行业测定沉积物中总汞的应用沉积物中的汞是嵌入水生生态系统底层的汞。汞通过火山活动和岩石随时间的矿物风化以及工业和城市资源（如燃煤发电厂或危险废物焚烧）自然进入水体。释放到空气中的汞最终可能会沉入水中或被冲入水中，在那里它沉积在湖底、河床、湿地和潮间带上，并与底部基质融为一体。沉积物汞可被微生物转化为甲基汞，这是一种剧毒化学物质，会在鱼类、贝类和吃鱼的动物体内积聚。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，为了防止汞中毒或评估污染问题的可能性，有必要准确量化沉积物中的总汞.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.