title: Partial least-squares regression for the simultaneous determination of aluminum and beryllium in geochemical samples using xylenol orange.
abstract: A partial least-squares regression (PLS) was developed for the simultaneous spectrophotometric determination of aluminum and beryllium in geochemical samples by xylenol orange as the chromogenic reagent in water media and in micellar media. The effects of pH, xylenol orange concentration and surfactant concentration on the complexes formation reactions were studied. In the absence of surfactant the complex color development takes place at 2 h after mixing the reagents. By using CTAB as micellar media the complexes formation was improved and the rate of the complexation reactions increased. By using PLS-1 algorithm satisfactory results were obtained. The proposed procedure showed to be useful for prediction of Al and Be values from 0.1 to 1.0 mg L(-1).
authors.affiliation: Department of Chemistry, Faculty of Science, Bu-Ali Sina University, 65174 Hamadan, Iran. madrakian@basu.ac.ir
authors.forename: T
authors.initials: T
authors.lastname: Madrakian
authors.forename: A
authors.initials: A
authors.lastname: Afkhami
authors.forename: M
authors.initials: M
authors.lastname: Borazjani
authors.forename: M
authors.initials: M
authors.lastname: Bahram
mesh_terms: D000535:Aluminum / Q000032:analysis* / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry; D001608:Beryllium / Q000032:analysis* / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000032:analysis / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016018:Least-Squares Analysis; D010636:Phenols; D013053:Spectrophotometry; D013454:Sulfoxides; D014992:Xylenes / Q000032:analysis / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D005456:Fluorescent Dyes; D010636:Phenols; D013454:Sulfoxides; D014992:Xylenes; C411138:beryl; D000535:Aluminum; D001608:Beryllium; C016833:xylenol orange