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钒的极谱催化波已有研究。本文提出,在pH=5.4的缓冲溶液中,钒(V)与铍试剂Ⅲ能产生一个灵敏的络合物吸附波,检测下限为0.03μg/ml。此波选择性好,绝大多数金属离子存在相当量时不干扰。钛(Ⅳ)在钒(Ⅴ)附近起波,量大时有正干扰,但当有一定量的F-存在时亦可允许较大量的钛(Ⅳ)存在。方法简便快速,具有较好的稳定性和准确度。测定了部份化探标样中的微量钒,结果良好。 (一)仪器和试剂 JP-1A型示波极谱仪,银电极为参比,三电极导数扫描。醋酸钠溶液:20％(W/V),
Polarographic catalytic waves of vanadium have been studied. In this paper, vanadium (V) and beryllium reagent Ⅲ can produce a sensitive complex adsorption wave in pH = 5.4 buffer with the detection limit of 0.03μg / ml. The wave selectivity is good, the vast majority of metal ions do not interfere when there is a considerable amount. Titanium (Ⅳ) in the vanadium (Ⅴ) near the wave, a large amount of positive interference, but when a certain amount of F-present also allows a larger amount of titanium (Ⅳ) exists. The method is simple and fast, with good stability and accuracy. Determination of some of the geochemical trace trace of vanadium, the result is good. (A) Instruments and reagents JP-1A oscilloscope polarographic instrument, silver electrode as a reference, three-electrode derivative scan. Sodium acetate solution: 20% (W / V),