3-Nitroso-4-hydroxy-5,6-benzocoumarin as a selective reagent for the spectrophotometric determination of ruthenium(III)

Kohli, Nitin; Singh, Vikram

doi:10.1016/0039-9140(74)80202-x

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Most of the spectrophotometric methods involve both extraction and heating of the reaction mixture [13][14][15] or only heating [16,17]. The organic solvents used for the extraction process, such as benzene and chloroform, are often carcinogenic, toxic and cause environmental pollution.…”

Section: Discussionmentioning

confidence: 99%

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

Rao¹,

Chandrasekhar²,

Devanna³

2012

Chem. Met. Alloys

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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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Section: Discussionmentioning

confidence: 99%

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

Rao¹,

Chandrasekhar²,

Devanna³

2012

Chem. Met. Alloys

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Quantitative Estimation of Ruthenium(III) Using Morpholine‐4‐Carbodithioate as a New Analytical Reagent

Kumar¹,

Singh²,

Kansal³

1979

J Chinese Chemical Soc

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Ruthenium(II1) has been precipitated gravimetrically in the pH range 7.0-8.5 with morpholine-4-carbodithioate and determined by weighing as a black complex {C,HaONSJ,Ru after drying at lOO-llO·C. The interference of the various metal ions has been avoided by using an ammonical mixture of EDTA and tartrate (1:1 molar ratio). The complex is thermally stable up to l&C.Very few methods are available in literature for the gravimetric determinations of ruthenium(III). Though reagents such as mepazine hydrochloride», 4-amino-S-nitro-2,6-pyrimi· dinediolv, 3-nitroso-4-hydroxy-S.6 benzocoumarin') and thiovoluric llcid u have been used to determine ruthenium(III) spectrophotome-trical1y. Bayer and Ottl) reported morpholine-4carbodithioate as a possible analytical reagent.Here we report, the results of quantitative estimarion, separation, thermogravimetric analysis and IR studies. MATERIALS AND METHODSThe potassium salt of the reagent was prepared by mixing potassium hydroxide, morpholine and earbondisulphide in ether at O'C in a ratio 1: 1: 1. The purity of the reagent was confirmed by elemental analysis and IR spectra.The stock solution of ruthenium was prepared by dissolving 1.0 gm. of ruthenium(III) chloride (J. M. Chemicals, London) in dilute hydrochloric acid. The ruthenium content was standardized gravimetrically by thioanilide method51.The thermogravimetric studies of the metal chelate was carried out on a stanticn-thermo gravimetric Balance at the heating rate of 3'CI minute. Procedure for the Determination of Ruthenium (ill)Aliquots of the standard solution of ruthe-nium{III) was diluted to about 100 ml, with distilled water and the pH was adjusted between 7.0-8.5. The 1% (wlv) reagent solution was added to it with continuous stirring of the beaker contents. The black precipitate obtained was digested on steam-bath at 60-70°for about half an hour. The metal complex was filtered through sintered glass crucible(G-4). washed thoroughly with distilled water, dried at 100-110°and weigh as Ru(C,H,ONSs),.It has been observed that tuthenium(III) can quantitatively be precipitated in the pH 7.0-8.5. The results of twenty-five estimations over the pH range 7.0-8.5 revealed that 3.0 mg of ruthenium in 100ml could be estimated with an average error :to.38%.The complex starts decomposing at 160'.The loss in weight at 490·C is 34.5% corresponding to a mixture of metal sulfate and oxide.The conversion factor. RujRu-Complex is 0.17i9.The chelate is soluble in chloroform, acetone, I. ChiMU Chem. Soc.. 26, 83-84 (1979)

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H

Macdonald¹,

Lingard²

1993

Dictionary of Analytical Reagents

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3-Nitroso-4-hydroxy-5,6-benzocoumarin as a selective reagent for the spectrophotometric determination of ruthenium(III)

Cited by 4 publications

References 6 publications

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

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

Quantitative Estimation of Ruthenium(III) Using Morpholine‐4‐Carbodithioate as a New Analytical Reagent

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