title: [Simultaneous determination of germanium and molybdenum in mixtures by complexation with 5'-nitrosalicyfluorone and dual-wavelength standard addition spectrophotometry].
abstract: In the presence of hexadecyltrimethylammonium bromide and in a medium of 0.3-0.9mol/L sulfuric acid, germanium (IV) and molybdenum (VI) react with 2,6,7-trihydroxy-9 (2'-hydroxy-5'-nitro) phenylfluorone-3, i.e., 5'-nitrosalicyfluorone, to develop red complexes, respectively. The spectra of the two complexes overlap seriously each other, and the additivity of their absorbances is good in the wavelength range of 490-548nm. So a new method for simultaneous spectrophotometric determination of germanium and molybdenum by dual-wavelegth standard addition method has been investigated in detail. The analytical results of five standard mixtures are more accuracy than those obtained by isobestic-point dual-wavelength method. The method has been applied to the analysis of traditional chinese medicine and mineral water with satisfactory results.
authors.affiliation: Department of Chemical Engineering, Sichuan Institute of Light Industry and Chemical Technology, 643033 Zigong.
authors.forename: Z
authors.initials: Z
authors.lastname: Guo
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Zhang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry; D005461:Fluorine / Q000737:chemistry*; D005857:Germanium / Q000032:analysis* / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008900:Mineral Waters / Q000032:analysis; D008982:Molybdenum / Q000032:analysis* / Q000737:chemistry*; D009574:Nitro Compounds / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D013997:Time Factors
chemical_list: D004365:Drugs, Chinese Herbal; D008900:Mineral Waters; D009574:Nitro Compounds; D005857:Germanium; D005461:Fluorine; D008982:Molybdenum