title: Spectral study of the interaction between 2-pyridinecarbaldehyde-p-phenyldihydrazone and ferric iron and its analytical application.
abstract: The synthesis and spectral characterization of a schiff base, 2-pyridinecarbaldehyde-p-phenylenedihydrazone (short for 2PC-PPH), were described. It was found that ferric ion (Fe(3+)) could selectively quench the fluorescence of 2PC-PPH, whereas many other metal ions, such as Mn(2+), Zn(2+), Cu(2+), K(+), Al(3+), Ca(2+), Ni(2+), Co(2+), Cr(3+) and Fe(2+), could not quench its fluorescence. Based on this, a sensitive method for ferric ion selective detection was established. Under the optimum conditions, the decreasing fluorescence intensity of 2PC-PPH is proportional to the concentration of Fe(3+) within the range of 6.0×10(-7)-1.0×10(-5) mol L(-1). The detection limit (3σ) for Fe(3+) determination is 3.6×10(-7) mol L(-1). The proposed method was successfully applied to determine iron in tea and milk powder.
authors.affiliation: College of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Quanying
authors.initials: Q
authors.lastname: Zhou
authors.forename: Weizhou
authors.initials: W
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Chang
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
mesh_terms: D000818:Animals; D002412:Cations / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D057230:Limit of Detection; D008892:Milk / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013662:Tea / Q000737:chemistry
chemical_list: C573995:2-pyridinecarbaldehyde-p-phenyldihydrazone; D002412:Cations; D005456:Fluorescent Dyes; D006835:Hydrazones; D011725:Pyridines; D012545:Schiff Bases; D013662:Tea; D007501:Iron