title: [Study and spectrophotometric determination of trace silver with iodide-Victoria Pure Blue BO system].
abstract: Analytical properties and spectra of naphthyl diphenymethane basic dyes and associated complexes of dye with [AgI2]- was studied. A new method for the spectrophotometric determination of trace amount of silver was developed. The method was based on the Victoria Pure Blue BO reacted with [AgI2]- to form blue associated complex in the buffer medium of H3PO4 -NaH2PO4. The spectrophotometric measurements were directly carried out at 574 nm, the apparent molar absorptivity of associated complex was 7.25 x 10(4) L x mol(-1) x cm(-1). The Beer's law was obeyed in the range of 4-250 microg x L(-1). The recoveries were in the range of 97.0%-98.3%. RSD was 2.7%. The method has been used to determination of trace silver in river water with satisfactory results.
authors.affiliation: College of Urban Construction, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Wen-Jian
authors.initials: WJ
authors.lastname: Shi
authors.forename: Fei
authors.initials: F
authors.lastname: Xu
authors.forename: Yun
authors.initials: Y
authors.lastname: Yu
mesh_terms: D005618:Fresh Water / Q000032:analysis / Q000737:chemistry; D007454:Iodides / Q000032:analysis* / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D012834:Silver / Q000032:analysis* / Q000737:chemistry; D018030:Silver Compounds / Q000032:analysis* / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D007454:Iodides; D010710:Phosphates; D010756:Phosphoric Acids; D000644:Quaternary Ammonium Compounds; D018030:Silver Compounds; D014874:Water Pollutants, Chemical; C084160:Victoria blue BO; D012834:Silver; C030584:silver iodide