Applications of Heteroligand Complexes in the Analytical Chemistry of Niobium and Tantalum

Modern precision spectrophotometric and extraction-spectrophotometric methods for the determination of niobium and tantalum are based on the use of heteroligand (ternary, quaternary, and mixed) complexes of these elements with organic reagents. These methods make it possible to determine niobium and tantalum in complex materials without separating the components, which has greatly extended the scope of analytical methods in the chemistry of niobium and tantalum.
The bibliography includes 131 references.