前言极谱法测定矿石中的铅,常在酸性介质中进行,但对微量铅的测定往往灵敏度达不到要求。近年来国内对微量铅的测定方法进行了一些研究,但在铁矿中对某些干扰元素的消除不够理想。我们通过试验发现对铁矿中微量铅在盐酸—磷酸—碘化钾体系中铅能以(PbI_4]~(2-)络离子形式吸附在滴汞电极表面上,产生一个对称波峰尖锐的导数。吸附催 Preface Polarographic determination of lead in ore, often in acidic medium, but the determination of trace amounts of lead often fails to meet the sensitivity requirements. In recent years, some domestic research methods for the determination of trace lead have been studied, but the elimination of some disturbing elements in iron ore is not ideal enough. We have found through experiments that lead can be adsorbed on the droplet mercury electrode surface in the hydrochloric acid-phosphoric acid-potassium iodide system by Pb (Pb) 4 ~ (2) complex ions, resulting in a sharp derivative of the symmetric peak.