在不降低甲烷化催化剂活性的前提下,尽量降低其中镍的含量是一项很有意义的工作。本文对 Ni-MgO-La_2O_3/Al_2O_3系列催化剂中镍的快速极谱法测定进行了探讨。该法具有灵敏度高、快速、操作及装置简单等优点,且在很多方面得到了应用。我们以0.04M酒石酸铵为铝离子掩蔽剂,0.1M 亚硫酸钠为除氧剂,在0.1M 氯化铵、3.0M 氨底液中对样品进行了测定,获得较满意的结果。 Without reducing the activity of the methanation catalyst, minimizing the nickel content is a significant task. In this paper, Ni-MgO-La_2O_3 / Al_2O_3 series of catalysts for the determination of nickel by rapid polarographic method were discussed. The method has the advantages of high sensitivity, fastness, simple operation and simple device, and has been applied in many aspects. We use 0.04M ammonium tartrate as masking agent of aluminum ion and 0.1M sodium sulfite as oxygen scavenger in 0.1M ammonium chloride and 3.0M ammonia solution to get more satisfactory results.