title: Investigation of the reaction of magnesium with p-nitro-o-carboxylazochromotropic acid and the determination of magnesium in plants and in water.
abstract: The formation of a novel complex between magnesium and p-nitro-o-carboxylazochromotropic acid (NCBAC) has been observed which is sensitive and selective at pH 10.4 in the presence of ethylenediamine and fluoride. The constants of formation of this complex have been determined by a spectral correction technique, and the complexation reaction has been applied to the spectrophotometric determination of trace magnesium in plants and in water with satisfactory results.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, People's Republic of China. gaohongw@mail.hf.ah.cn
authors.forename: Hong-Wen
authors.initials: HW
authors.lastname: Gao
authors.forename: Jia-Xiang
authors.initials: JX
authors.lastname: Yang
authors.forename: Zhong-Ze
authors.initials: ZZ
authors.lastname: Zhou
authors.forename: Jian-Fu
authors.initials: JF
authors.lastname: Zhao
mesh_terms: D006863:Hydrogen-Ion Concentration; D008274:Magnesium / Q000032:analysis* / Q000737:chemistry*; D009282:Naphthalenesulfonates / Q000737:chemistry*; D012680:Sensitivity and Specificity; D031205:Taraxacum / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D030521:Zingiberaceae / Q000737:chemistry*
chemical_list: D009282:Naphthalenesulfonates; C479279:p-nitro-o-carboxylazochromotropic acid; D014867:Water; D008274:Magnesium; C020996:chromotropic acid