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氯代磺酚C是一种灵敏度较高的显色剂,它与铌生成1:1紫色的络合物,由于稳定性和选择性好,往往不必预先分离其它元素即可直接测定,国内已普遍应用于低含量铌的测定。本文着重试验了氯代磺酚C的用量与被测铌量的关系。确定了每毫升0.1％的氯代磺酚C能与110微克左右的五氧化二铌显色,若用示差分光光度法测定,高达700微克的五氧化二铌/50毫升尚符合比耳定律(北京化工厂试剂,其它厂的试剂在示差法中测定的上限较低)。据此拟定的方法可测定含量高达75％的铌合金试样,其准确度能
Chlorosulfonamide C is a highly sensitive developer that generates a 1: 1 violet complex with niobium. Because of its good stability and selectivity, it is often possible to determine directly without having to separate other elements in advance Commonly used in the determination of low content of niobium. This article focuses on the test of the amount of chlorosulfonated C and the relationship between the amount of niobium measured. It has been determined that chlorosulfonamide C at 0.1% per milliliter is capable of coloring with about 110 micrograms of niobium pentoxide, and up to 700 micrograms of niobium pentoxide per 50 milliliters is in accordance with Beer’s Law Beijing Chemical Factory reagents, other plants reagents in the differential method to determine the lower limit). According to the proposed method can be measured up to 75% of the niobium alloy sample, its accuracy can