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我们对氯代磺酚—C直接比色测定铌进行了一些基本显色条件的试验,并探索了主要共存离子对测定的影响。实验说明,方法适用于测定硬质合金中0.5—5％的含铌量。操作简便,精确度高。试剂与仪器氯代磺酚—C:0.05％水溶液(北京化工厂) 乙二胺四乙酸二钠盐(EDTA):1％水溶液酒石酸:30％水溶液
We performed some basic color development conditions for the direct colorimetric determination of niobium chlorosulfonate-C and explored the effect of the main coexisting ions on the determination. Experiments show that the method is suitable for the determination of 0.5-5% niobium content in cemented carbide. Simple operation, high accuracy. Reagents and Instruments Chlorosulfonamide-C: 0.05% aqueous solution (Beijing Chemical Plant) Disodium ethylenediaminetetraacetate (EDTA): 1% aqueous solution Tartaric acid: 30% aqueous solution