title: [Simultaneous determination of trace Ni2+, Mn2+, Zn2+ and Cu2+ with microwave derivatization/ion-pair high performance liquid chromatography/meso-tetra(4-sulfophenyl)-porphyrin spectroscopy].
abstract: The best conditions for the reaction of meso-tetra(4-sulfophenyl)-porphyrin (TPPS4) with Mn2+, Ni2+, Zn2+ and Cu2+ have been investigated. A method for the fast determination of Ni2+, Mn2+, Zn2+ and Cu2+ has been developed: microwave derivatization at 750 W for 3 min, C18 column, acetonitrile-water(22.5:77.5, volume ratio) as mobile phase with tetraethylammonium bromide (TEABr) as ion-pair reagent and detection wavelength of 415 nm. The detection limits for Zn2+, Cu2+, Ni2+ and Mn2+ were 0.05 microgram/L, 0.01 microgram/L, 0.10 microgram/L and 0.40 microgram/L, respectively. This method has been applied to analyze the concentrations of these four metal ions in marketed tea.
authors.affiliation: National Chromatographic R. & A. Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Department of Chemistry and Chemical Engineering, Dalian University, Dalian, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Guo
authors.forename: Liang
authors.initials: L
authors.lastname: Kong
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Han-Fa
authors.initials: HF
authors.lastname: Zou
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D003300:Copper / Q000032:analysis*; D008345:Manganese / Q000032:analysis; D008665:Metalloporphyrins; D008872:Microwaves; D009532:Nickel / Q000032:analysis*; D013662:Tea / Q000737:chemistry; D015032:Zinc / Q000032:analysis
chemical_list: D008665:Metalloporphyrins; D013662:Tea; C441604:meso-tetra(4-sulphonatophenyl)porphyrinato copper(II); D008345:Manganese; D003300:Copper; D009532:Nickel; D015032:Zinc