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Novel analytical reagent for the quantification of Mn(II) in various water systems

B.Natesh Kumar, Suvardhan Kanchi, S.Venkateswarulu, N.V.V.Jyothi

Novel, facile, sensitive and selective analytical reagent (6E,7E)-N2,N3-bis(3- methoxybenzylidene)pyridine-2,3-diamine(BMBPD)was synthesized for the determination of Mn(II) in various environmental samples with spectrometer. The method was based on chelation of Mn(II) with (6E,7E)-N2,N3- bis(3-methoxybenzylidene)pyridine-2,3-diamine (BMBPD) at pH4.5 in presence of acetate buffer in 1:2 ratio(M:L) and obtained a orange colored derivative with ëmax of 460 nm. The complex obeys BeerÂ’s law up to 1.1 mg l-1 with an optimumconcentration range over 0.15 to 1.2 mg l-1. SandellÂ’s sensitivity of the orange color reactionwas calculated to be 0.0012 ìg cm-2with molar absorptivity of 5.4 ×104 lmol-1 cm-1.Various optimumconditions such as effect of pH, reagent concentration, accuracy, precision and reproducibility for the determination ofMn(II) in differentwater systemswere investigated. The detailed study of various interferences confirmed the high selectivity of the present method. The developed method was applied successfully for the analysis of trace and ultra trace levels ofMn(II) in various water systems and the obtained results were also compared with AAS method.