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氨氮是指水中以游离氨(NH_3)和铵离子(NH~+_4)形式存在的氮,其是水体中的营养素,可导致水富营养化现象产生,也是水体中的主要耗氧污染物,对鱼类及某些水生生物有毒害。氨氮可以在一定条件下转化成亚硝酸盐,如果长期饮用,水中的亚硝酸盐将和蛋白质结合形成亚硝胺,是一种强致癌物质,危害人体健康。因此,氨氮是判断水体是否被有机物污染的一个重要指标。水中氨氮含量测定《生活饮用水卫生标准》首选方法为纳氏试剂分光光度法[1],该法简
Ammonia nitrogen refers to the nitrogen in the form of free ammonia (NH_3) and ammonium ion (NH_4) in water, which is a nutrient in water and can cause water eutrophication and is also the main oxygen consuming pollutant in water. Toxic to fish and certain aquatic organisms. Under certain conditions, ammonia nitrogen can be converted into nitrite. If it is consumed for a long time, the nitrite in the water will combine with the protein to form nitrosamine, which is a strong carcinogen and endanger human health. Therefore, ammonia nitrogen is an important indicator to judge whether water is contaminated by organic matter. Determination of ammonia nitrogen in water “Drinking water health standards,” the preferred method for the Nessler reagent spectrophotometry [1], the method of Jane