title: Fast simultaneous determination of niobium and tantalum by Kalman Filter analysis with flow injection chemiluminescence method.
abstract: 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 (3sigma, n = 11) of niobium(V) and tantalum(V) were 2.1 x 10(-3) microg g(-1) and 4.0 x 10(-3) microg 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.
authors.affiliation: Department of Chemistry, Jilin Uinversity, Changchun, PR China.
authors.forename: Hongxia
authors.initials: H
authors.lastname: Wang
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
authors.forename: Zhengxia
authors.initials: Z
authors.lastname: Chen
authors.forename: Mingyang
authors.initials: M
authors.lastname: Liu
authors.forename: Hongyan
authors.initials: H
authors.lastname: Wang
mesh_terms: D017022:Flow Injection Analysis / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry; D008163:Luminescent Measurements / Q000379:methods*; D008851:Micropore Filters; D009556:Niobium / Q000032:analysis*; D012680:Sensitivity and Specificity; D013635:Tantalum / Q000032:analysis*; D013997:Time Factors
chemical_list: D009556:Niobium; D013635:Tantalum