title: Spectrophotometric determination of anilines based on charge-transfer reaction.
abstract: The molecular interactions between aniline, p-toluidines, benzidine and p-phenylenediamine as electron donors and 7,7,8,8-tetracyanoquinodimethane (TCNQ) as acceptor have been investigated by spectrophotometric method. Different variables affecting the reaction were studies and optimized. At the optimum reaction conditions Beer's law was obeyed in a concentration limit of 0.6-3.0, 0.3-3.0, 0.3-3.0 and 0.3-2.7 microg ml(-1) for aniline, p-toluidines, benzidine and p-phenylenediamine. The developed methods were applied successfully for the determination of the studied compounds in waste water and relative standard deviation of the methods were 0.8-3.0%. Percentage recoveries ranged from 97.22% to 102.78%.
authors.affiliation: Analytical and Testing Center, Shanxi Normal University, Shanxi Linfen 041004, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.forename: Li Ming
authors.initials: LM
authors.lastname: Du
mesh_terms: D000814:Aniline Compounds / Q000032:analysis* / Q000737:chemistry; D001560:Benzidines / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D009570:Nitriles / Q000032:analysis* / Q000737:chemistry; D010655:Phenylenediamines / Q000032:analysis* / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D013816:Thermodynamics; D014052:Toluidines / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D000814:Aniline Compounds; D001560:Benzidines; D009570:Nitriles; D010655:Phenylenediamines; D014052:Toluidines; D014874:Water Pollutants, Chemical; C013703:tetracyanoquinodimethane; C029876:benzidine; C029370:4-toluidine; C023650:aniline; C029728:4-phenylenediamine