前言极谱连续测定铜、铅、镉、锌的方法很多,而这四种元素与镍同时测定或样品中含钴就不易同时测定了。我们曾用萃取极谱法测定了上述六种元素。本文不经萃取,同时测定一般矿石,钴精矿中的铜、铅、镉、锌镍五种元素。在氯化钠—盐 Preface Polarography continuous determination of copper, lead, cadmium, zinc, many ways, and these four elements with the nickel determination or sample containing cobalt is not easy to determine at the same time. We have determined the above six elements by extrapolation. This article without extraction, simultaneous determination of general ore, cobalt concentrate of copper, lead, cadmium, zinc and nickel five elements. In sodium chloride - salt