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本文研究并提出了催化极谱法测定催化剂中微量铂的体系.0.15mol/L磷酸氢二铵-0.5mol/L硫酸-4.0×10~(-3)mol/L六次甲基四胺底液中,于-1.02伏(vS.SCE)产生一灵敏的催化波,线性范围10×10~(-5)-8.0×10~(-3)μg/ml.本体系选择性好,数十种常见元素无干扰,可不经分离富集直接测定催化剂中微量铂.
In this paper, a catalytic polarographic method for the determination of trace platinum in catalysts has been developed and proposed.It contains 0.15 mol / L diammonium hydrogen phosphate - 0.5 mol / L sulfuric acid - 4.0 × 10 -3 mol / L hexamethine tetramine Liquid, a sensitive catalytic wave was generated at -1.02 volts (vS.SCE) with a linear range of 10 × 10 -5 -8.0 × 10 -3 μg / ml.The selectivity of the system was good, The kind of common elements without interference, can be directly measured without separation of traces of platinum in the catalyst.