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汞在常态下系銀白色的液体金属。在工矿企业、国防和科学研究部門汞的应用极为广泛。在常溫下就有汞蒸气发生,它易为建筑材料、木器、織物等所吸附。汞既能引起急性中毒,也能引起慢性中毒。空气中极限允許濃度为0.01毫克/米~3。測定空气中汞蒸气的方法我国通常采用苏联波列沙也夫比色分析測定法。其采样和分析过程均較煩复,誤差也較大。为了快速、准确地測定空气中汞蒸气的含量,因此进行了汞蒸气比长度測定管的試制研究。測定原理是使用糊状碘化亚銅来处理硅胶以制成指示粉。当抽取汞蒸气通过乳白色的指示粉时卽形成紅橙色的着色柱。其反应式如下: 2Cu_2I_2+Hg→Cu_2[HgI_4]+2Cu 获得的着色长度与汞蒸气濃度成正比例。
Mercury in the normal silver white liquid metal. In industrial and mining enterprises, mercury and mercury are widely used in defense and scientific research departments. Mercury vapor occurs at room temperature, it is easy for building materials, wood, fabrics and other adsorption. Mercury can cause both acute poisoning and chronic poisoning. Air limit of the allowable concentration of 0.01 mg / m ~ 3. Determination of mercury in the air method commonly used in our country, the Soviet Union Pole Sha Fu Ye colorimetric assay. The sampling and analysis process are annoying complex, the error is larger. In order to quickly and accurately measure the amount of mercury vapor in the air, a pilot study of mercury vapor specific length measuring tubes was conducted. The determination principle is to use paste of cuprous iodide to treat silica gel to make indicator powder. When drawing mercury vapor through the milky white indicator powder, a red-orange colored column was formed. The reaction is as follows: 2Cu_2I_2 + Hg → Cu_2 [HgI_4] + 2Cu obtained coloring length and mercury vapor concentration is proportional to.