Use of galvanostatic coulometry for determining nitroxoline

It was found that nitroxoline rapidly and quantitatively reacts with electrogenerated chlorine or bromine. The stoichiometric coefficients of these reactions are 1: 1.5 and 1: 1, respectively. The mechanism of the reaction of nitroxoline with electrogenerated bromine was proposed. A procedure was developed for the quantitative determination of nitroxoline in the substance and pharmaceuticals with a relative standard deviation of 1-3%. © 2007 Pleiades Publishing, Ltd

Extraction-coulometric determination of copper as copper(II) 8-hydroxyquinolinate

Conditions were selected for the coulometric determination of copper(II) by titrating copper(II) 8-hydroxyquinolinate extracted to chloroform with electrochemically generated bromine. The procedure was tested on model solutions and samples of surface waters. The detection limit is 5 × 10-7 M at a generation current and time of 1 × 10-3 A and 10 s, respectively. © 2005 Pleaides Publishing, Inc

Use of galvanostatic coulometry for determining nitroxoline

It was found that nitroxoline rapidly and quantitatively reacts with electrogenerated chlorine or bromine. The stoichiometric coefficients of these reactions are 1: 1.5 and 1: 1, respectively. The mechanism of the reaction of nitroxoline with electrogenerated bromine was proposed. A procedure was developed for the quantitative determination of nitroxoline in the substance and pharmaceuticals with a relative standard deviation of 1-3%. © 2007 Pleiades Publishing, Ltd

Extraction-coulometric determination of copper as copper(II) 8-hydroxyquinolinate

Conditions were selected for the coulometric determination of copper(II) by titrating copper(II) 8-hydroxyquinolinate extracted to chloroform with electrochemically generated bromine. The procedure was tested on model solutions and samples of surface waters. The detection limit is 5 × 10-7 M at a generation current and time of 1 × 10-3 A and 10 s, respectively. © 2005 Pleaides Publishing, Inc

Use of galvanostatic coulometry for determining nitroxoline

It was found that nitroxoline rapidly and quantitatively reacts with electrogenerated chlorine or bromine. The stoichiometric coefficients of these reactions are 1: 1.5 and 1: 1, respectively. The mechanism of the reaction of nitroxoline with electrogenerated bromine was proposed. A procedure was developed for the quantitative determination of nitroxoline in the substance and pharmaceuticals with a relative standard deviation of 1-3%. © 2007 Pleiades Publishing, Ltd

Extraction-coulometric determination of copper as copper(II) 8-hydroxyquinolinate

Conditions were selected for the coulometric determination of copper(II) by titrating copper(II) 8-hydroxyquinolinate extracted to chloroform with electrochemically generated bromine. The procedure was tested on model solutions and samples of surface waters. The detection limit is 5 × 10-7 M at a generation current and time of 1 × 10-3 A and 10 s, respectively. © 2005 Pleaides Publishing, Inc

Use of galvanostatic coulometry for determining nitroxoline

It was found that nitroxoline rapidly and quantitatively reacts with electrogenerated chlorine or bromine. The stoichiometric coefficients of these reactions are 1: 1.5 and 1: 1, respectively. The mechanism of the reaction of nitroxoline with electrogenerated bromine was proposed. A procedure was developed for the quantitative determination of nitroxoline in the substance and pharmaceuticals with a relative standard deviation of 1-3%. © 2007 Pleiades Publishing, Ltd

Coulometric titration of benzoic and isonicotinic acid derivatives of hydrazides and acylhydrazones

It was found that benzoic acid hydrazides rapidly and quantitatively react with electrogenerated chlorine and bromine under the conditions of galvanostatic coulometry. Benzoic acid hydrazides were determined in model solutions. A good precision (RSD varied from 1 to 6%) allowed coulometry to be applied to the determination of isonicotinic acid hydrazide in isoniazid tablets and isonicotinic acid 3-methoxy-4-hydroxybenzylidenehydrazide in phthivazid tablets. © 2008 MAIK Nauka

Coulometric titration of benzoic and isonicotinic acid derivatives of hydrazides and acylhydrazones

It was found that benzoic acid hydrazides rapidly and quantitatively react with electrogenerated chlorine and bromine under the conditions of galvanostatic coulometry. Benzoic acid hydrazides were determined in model solutions. A good precision (RSD varied from 1 to 6%) allowed coulometry to be applied to the determination of isonicotinic acid hydrazide in isoniazid tablets and isonicotinic acid 3-methoxy-4-hydroxybenzylidenehydrazide in phthivazid tablets. © 2008 MAIK Nauka

La Patrie : journal quotidien, politique, commercial et littéraire

29 février 18481848/02/29 (A8,N60)