测定金属中碳的方法一般是将金属试样放在氧气流中燃烧,其中的碳化物及游离碳全部转化为二氧化碳,然后用重量法、气体容量法、氢氧化钡滴定法、非水滴定法、电导法、库仑法等方法进行测定。本文用库仑法测定铌、钽中0.002—0.1％碳,对有关条件进行了试验,选取 Determination of metal carbon in the metal sample is generally placed in the oxygen flow combustion, in which all carbide and free carbon into carbon dioxide, and then gravimetric method, gas volumetric method, barium hydroxide titration, non-aqueous titration, Conductivity method, coulometry and other methods for determination. In this paper, coulometric determination of niobium, tantalum 0.002-0.1% carbon, the conditions were tested, select