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据“Analyst”vol.110 (11)1329(1985)报道:自4—6M HCl的NbOCl(SCN)_3~-TPP~+离子缔合物中萃取分光光度测定Nb(v)。方法的精确度,准确性和选择性良好。大量的Fe(111)用IBMK萃取分离,而Nb(v)不损失。10倍于Nb(v)量的Ta(v)不干扰。可应用于钢样和矿石中铌的测定。
Analytical vol. 110 (11) 1329 (1985) reported the extraction spectrophotometric determination of Nb (v) from 4-6M HCl in NbOCl (SCN) 3 -TPP + ion complexes. The accuracy, accuracy and selectivity of the method are good. A large amount of Fe (111) is extracted by IBMK extraction, while Nb (v) is not lost. Ta (v) which is 10 times the amount of Nb (v) does not interfere. It can be applied to the determination of niobium in steel samples and ores.