【摘要】 本文研究了铅与三溴偶氮胂的显色反应,在0.3mol/L的H₃PO₄介质中铅与三溴偶氮胂可生成紫红色的络合物,其最大吸收波长为620nm,表观摩尔吸光系数为3.2×10⁴,铅在0～12.5μg/25ml符合比尔定律,已拟出直接光度法测定铜铅合金和粗铜中铅的分析方法。更多还原

【Abstract】 The colour reaction of lead-TEA has been studied. In the medium of O.3mol/LHaPO4, lead can form a violet-red complex with TEA. The maximum absoption of the complex occurs at 620 nm, and the apparent molar absorptivity is 3.2×104. Beer’s law is obeyed in the range of 0-12.5 IMS Pb/25ml. The method has been used directly for the determination of lead in copper-lead alloys and raw copper.更多还原