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硫氰酸盐用于比色测定低含量铌是较灵敏方法之一,但将硫氰酸盐-铌(V)络合物用于极谱测定却未见极导。极谱测定铌的支持电解质多采用盐酸-草酸,pH4的醋酸盐-EDTA-K_2SO_4等。这些底液灵敏度均较低,在氯酸钠介质中,铌(V)-苯羟乙酸于E_P=-1.1V处产生的络合吸附波虽具有较高灵敏度,但铁、钛、钨、钼所引起的干扰和较长的分离手续使低量铌的分析有一定困难。本文较仔细地观察了铌(V)在盐酸、硫酸、磷
Thiocyanate is one of the more sensitive methods for the colorimetric determination of low levels of niobium, but the use of thiocyanate-niobium (V) complexes for polarography does not reveal polar conductivity. Polarographic determination of niobium support electrolyte with hydrochloric acid - oxalic acid, pH4 acetate - EDTA-K_2SO_4 and so on. The sensitivities of these substrates were low. The complexed adsorbed waves produced by niobium (V) -benzoic acid at E_P = -1.1V showed a high sensitivity in sodium chlorate, but the sensitivity of iron, titanium, tungsten, molybdenum The resulting interference and longer separation procedures make the analysis of low amounts of niobium somewhat difficult. This paper looks more carefully at niobium (V) in hydrochloric acid, sulfuric acid, and phosphorous