Analytical Sciences

Abstract − Analytical Sciences, 21(9), 1051 (2005).

Fast Simultaneous Determination of Niobium and Tantalum by Kalman Filter Analysis with Flow Injection Chemiluminescence Method
Hongxia WANG, Junfeng LI, Zhengxia CHEN, Mingyang LIU, and Hongyan WANG
Department of Chemistry, Jilin Uinversity, Changchun 130012, P. R. China
A fast and highly efficient Kalman Filter analysis-flow injection chemiluminescence (FI-CL) method was developed to simultaneously determine trace amounts of niobium and tantalum in geological samples. The method, without the boring process of separation and dear instruments, is suitable for field scene analysis. The mixed chemiluminescence kinetic curve was analyzed by a Kalman Filter (KF) in this method to realize the simultaneous determination of niobium and tantalum. Possible interference elements in the determination were investigated. Under the selected conditions, the detection limits (3 σ, n = 11) of niobium(V) and tantalum(V) were 2.1 × 10-3 µg g-1 and 4.0 × 10-3 µg g-1, respectively, and the relative standard deviations were 4.9% and 3.3% (n = 9). The method was applied to the determination of niobium and tantalum in geological samples with satisfactory results.