title: Application of spectral beta-correction method and partial least squares for simultaneous determination of V(IV) and V(V) in surfactant media.
abstract: Simultaneous determination of V(IV) and V(V) was performed by application of partial least squares when the calibration matrix was obtained using beta-correction spectra. Two reaction between V(IV) and V(V) and Pyrogallol Red as a ligand in presence of cethyltrimethylammoniumbromide (CTAB) media has been investigated and applied to the simultaneous spectrophotometric determination of these species. The parameters controlling behavior of the system were investigated and optimum conditions selected. Determinations were made over the concentration range 0.6-4.50 microg ml-1 of V(IV) and 0.3-5.50 microg ml-1 of V(V). Applying this method to simultaneous determination of these metal ions in several real samples with total relative standard error less than 5% validated the proposed method.
authors.affiliation: Department of Chemistry, College of Science, Shiraz University, Shiraz 71454, Iran. abbaspour@chem.susc.ac.ir
authors.forename: A
authors.initials: A
authors.lastname: Abbaspour
authors.forename: R
authors.initials: R
authors.lastname: Mirzajani
mesh_terms: D016018:Least-Squares Analysis; D011748:Pyrogallol / Q000031:analogs & derivatives; D013057:Spectrum Analysis; D013501:Surface-Active Agents / Q000737:chemistry*; D014639:Vanadium / Q000032:analysis* / Q000737:chemistry*
chemical_list: D013501:Surface-Active Agents; D014639:Vanadium; D011748:Pyrogallol; C058731:pyrogallol sulfonphthalein