A Process for the Separation & Recovery of Noble Metals from Spent Refractory Oxide Supported Cat... more A Process for the Separation & Recovery of Noble Metals from Spent Refractory Oxide Supported Catalysts
A sensitive and rapid method for the estimation of trace levels of indium in alumina supported ca... more A sensitive and rapid method for the estimation of trace levels of indium in alumina supported catalysts using square wave voltammetry (SWV) is discussed. The SWV method for indium in the alumina matrix is standardized using synthetic samples and good recoveries were obtained. Calibration graphs are linear in the range 1-5 mug/ml and the detection limit is 3.57 x 10(-8) g/ml. In order to determine the accuracy of the proposed method, the results obtained have been compared with those given by atomic absorption spectrophotometry (AAS). Statistical analysis shows no significant bias between the two methods. This technique is found suitable for the estimation of indium in the range 0.1-1.0% (w/w) in the catalyst samples with an RSD < 1.5%.
... Rao. V. C. Peddy, G. Kalpana and Valsamma J. Koshy Research Centre, Indian Petrochemicals Cor... more ... Rao. V. C. Peddy, G. Kalpana and Valsamma J. Koshy Research Centre, Indian Petrochemicals Corporation Limited, Baroda-397 346, India N. V. R. Apparao, MC Jain and RV Patel Research Centre, Indian Oil Corporation, Faridabad, India ... 116 mina. ...
Chlorine in alumina-based catalysts has been determined with a scanning electron microscope attac... more Chlorine in alumina-based catalysts has been determined with a scanning electron microscope attached to an energy dispersive x-ray analyser (SEM-EDX). The method is less time consuming compared to conventional methods involving sample dissolution followed by titrimetry, absorption spectrophotometry or ion chromatography. The spectrometer is calibrated with laboratory prepared standards. This technique is found suitable for the estimation of chlorine in the range 0.1-1.0% (w/w) with a relative standard deviation &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 10% for chlorine levels above 0.2%
The mixed ligand complexes Cr III (dpa)(L)Cl and Fe III (dpa)(L)(H 2 O) n Cl (where DPA = dipicol... more The mixed ligand complexes Cr III (dpa)(L)Cl and Fe III (dpa)(L)(H 2 O) n Cl (where DPA = dipicolinic acid, = ethylenediamine, 2,2-bipyridine or 1,10-phenanthroline, n = 1 or 2) were synthesized and characterized by elemental analysis and spectral, magnetic, conductance and ...
A Process for the Separation & Recovery of Noble Metals from Spent Refractory Oxide Supported Cat... more A Process for the Separation & Recovery of Noble Metals from Spent Refractory Oxide Supported Catalysts
A sensitive and rapid method for the estimation of trace levels of indium in alumina supported ca... more A sensitive and rapid method for the estimation of trace levels of indium in alumina supported catalysts using square wave voltammetry (SWV) is discussed. The SWV method for indium in the alumina matrix is standardized using synthetic samples and good recoveries were obtained. Calibration graphs are linear in the range 1-5 mug/ml and the detection limit is 3.57 x 10(-8) g/ml. In order to determine the accuracy of the proposed method, the results obtained have been compared with those given by atomic absorption spectrophotometry (AAS). Statistical analysis shows no significant bias between the two methods. This technique is found suitable for the estimation of indium in the range 0.1-1.0% (w/w) in the catalyst samples with an RSD < 1.5%.
... Rao. V. C. Peddy, G. Kalpana and Valsamma J. Koshy Research Centre, Indian Petrochemicals Cor... more ... Rao. V. C. Peddy, G. Kalpana and Valsamma J. Koshy Research Centre, Indian Petrochemicals Corporation Limited, Baroda-397 346, India N. V. R. Apparao, MC Jain and RV Patel Research Centre, Indian Oil Corporation, Faridabad, India ... 116 mina. ...
Chlorine in alumina-based catalysts has been determined with a scanning electron microscope attac... more Chlorine in alumina-based catalysts has been determined with a scanning electron microscope attached to an energy dispersive x-ray analyser (SEM-EDX). The method is less time consuming compared to conventional methods involving sample dissolution followed by titrimetry, absorption spectrophotometry or ion chromatography. The spectrometer is calibrated with laboratory prepared standards. This technique is found suitable for the estimation of chlorine in the range 0.1-1.0% (w/w) with a relative standard deviation &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 10% for chlorine levels above 0.2%
The mixed ligand complexes Cr III (dpa)(L)Cl and Fe III (dpa)(L)(H 2 O) n Cl (where DPA = dipicol... more The mixed ligand complexes Cr III (dpa)(L)Cl and Fe III (dpa)(L)(H 2 O) n Cl (where DPA = dipicolinic acid, = ethylenediamine, 2,2-bipyridine or 1,10-phenanthroline, n = 1 or 2) were synthesized and characterized by elemental analysis and spectral, magnetic, conductance and ...
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