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本法介绍用国产590型汞蒸气分析仪测定工业废水中汞的快速方法。样品用硝酸,硫酸,高锰酸钾,经加热消化,用Sn~(2+)使Hg~(2+)还原为Hg~o,以一定流量的净化空气将汞蒸气送入仪器的吸收管,进行紫外线吸收。方法的灵敏度为0.035 ppb汞水样(1％吸收),检出限量为10~(-4)毫克汞/升,相对误差在10％以内。鉴于通常对有机汞的消化方法时间长,要求恒温设备,不能适应简单、快速分析的要求。我
This Law describes the rapid method for measuring mercury in industrial wastewater using a domestic 590 mercury vapor analyzer. The samples were treated with nitric acid, sulfuric acid and potassium permanganate, and were digested by heat. Hg ~ (2+) was reduced to Hg ~ o by Sn ~ (2+) and the mercury vapor was sent to the absorption pipe , For UV absorption. The sensitivity of the method was 0.035 ppb mercury (1% absorption), with a detection limit of 10 -4 mg Mg / l and a relative error of less than 10%. In view of the long duration of the digestion of organic mercury, which requires constant temperature equipment, it can not be adapted to simple and fast analytical requirements. I