Determination of ruthenium(III) in the presence of micellar medium by derivative spectrophotometric technique

Abstract

A sensitive spectrophotometric method has been developed for the determination of ruthenium(III) using 3,5-dimethoxy-4-hydroxybenzaldehyde isonicotinoylhydrazone (DMHBIH) in presence of neutral miceller medium of Triton X-100. The metal ion forms a brownish yellow coloured water soluble complex with the DMHBIH reagent in acidic buffer pH 4.25. Spectral data shows the formation of an 1:1 (M:L) complex with a stability constant 1.82 × 10 6 . Beer's law is obeyed over a concentration range of 0.202 to 4.043 µg/mL of Ru(III) at 390 nm. The molar absorptivity and Sandell's sensitivity are calculated to be 1.7 × 10 4 L.mol -1 .cm -1 and 0.006 µg.cm -2 Ru(III) respectively. The developed derivative spectrophotometric method was employed for the determination of Ru(III) in synthetic alloy samples and real water samples. The effect of various diverse ions has also been studied. Derivative spectrophotometry / Ruthenium(III) / 3,5-dimethoxy-4-hydroxybenzaldehyde isonicotinoylhydrazone (DMHBIH) / Synthetic alloy samples / Real water samples

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“…Resolution of spectral bands can be achieved using derivative spectrophotometry, which allows location and detection of wavelength of complex spectra which is poorly resolved and also decrease the effect of interferences of spectral background. Simultaneous determination of metal ions by derivative spectrophotometric technique is not much exploited [20][21][22].…”

Sensitive derivative spectrophotometric determination of gold(III) using 3,5-dimethoxy-4-hydroxybenzaldehyde isonicotinoyl hydrazone (DMHBIH) in presence of micellar medium

“…The potential analytical applications of hydrazone derivatives have been reviewed by Singh et al [1]. Hydrazones are an important class of known analytical reagents [2][3][4][5][6][7][8][9][10][11]. They react with many metal ions forming colour complexes and act as chelating agents.…”