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本文报导了一个简单、快速、灵敏的示波极谱催化波测定矿石中微量铂的新体系:0.2%柠檬酸三铵-1N H_2SO_4-0.004M(CH_2)_6N_4。线性范围0.05~40ppb,检出下限0.005ppb。峰电位-0.93V(JP-1),-0.95V(JP-2)。体系选择性好,配合简单的溶矿处理,可以直接测定铬铁矿、铜镍矿、贵金属矿和多金属矿中的微量铂。作者还对催化机理作了进一步的探讨。
In this paper, a simple, rapid and sensitive method for the determination of trace platinum in ore by oscillopolarographic catalysis is reported: 0.2% triammonium citrate - 1N H_2SO_4 - 0.004M (CH_2) _6N_4. The linear range of 0.05 ~ 40ppb, detection limit of 0.005ppb. Peak potential -0.93V (JP-1), -0.95V (JP-2). The system has good selectivity and can be used for the direct determination of trace platinum in chromite, copper-nickel ores, precious metal ores and polymetallic ores with simple dissolution treatment. The author also made further discussion on the catalytic mechanism.