The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Jean-louis Burgot - One of the best experts on this subject based on the ideXlab platform.
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quantitative assay of 3 4 diaminopyridine in water by thermometric titrimetry
Thermochimica Acta, 1998Co-Authors: V Gicquel, Gwenola Burgot, Jean-louis BurgotAbstract:Abstract Thermometric titrimetry allows the quantitative assay of pure 3,4-diaminopyridine or in pharmaceutical capsules by Titration in water by hydrochloric acid. Satisfactory Titrations with 99 p 100 recovery and 1 p 100 precision were obtained with amounts of about 4.5×10 −4 mol. Lactose and starch used as excipients in the capsules as well as gelatin which constitutes their matrix did not interfere in the Titration.
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determination of acetaminophen by thermometric titrimetry
Analytica Chimica Acta, 1997Co-Authors: Gwenola Burgot, F Auffret, Jean-louis BurgotAbstract:Abstract A sensitive, accurate and precise thermometric Titration is described for the direct determination of ⩾75 mg of acetaminophen in pure form or in pharmaceutical formulations. Titrations are performed with aqueous sodium hydroxide solution. Excipients tested (starch, talc, lactose) had no effect on the accuracy and precision.
Gwenola Burgot - One of the best experts on this subject based on the ideXlab platform.
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quantitative assay of 3 4 diaminopyridine in water by thermometric titrimetry
Thermochimica Acta, 1998Co-Authors: V Gicquel, Gwenola Burgot, Jean-louis BurgotAbstract:Abstract Thermometric titrimetry allows the quantitative assay of pure 3,4-diaminopyridine or in pharmaceutical capsules by Titration in water by hydrochloric acid. Satisfactory Titrations with 99 p 100 recovery and 1 p 100 precision were obtained with amounts of about 4.5×10 −4 mol. Lactose and starch used as excipients in the capsules as well as gelatin which constitutes their matrix did not interfere in the Titration.
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determination of acetaminophen by thermometric titrimetry
Analytica Chimica Acta, 1997Co-Authors: Gwenola Burgot, F Auffret, Jean-louis BurgotAbstract:Abstract A sensitive, accurate and precise thermometric Titration is described for the direct determination of ⩾75 mg of acetaminophen in pure form or in pharmaceutical formulations. Titrations are performed with aqueous sodium hydroxide solution. Excipients tested (starch, talc, lactose) had no effect on the accuracy and precision.
P. R. Curtis - One of the best experts on this subject based on the ideXlab platform.
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The role of hydrogen peroxide in the deposition of cerium-based conversion coatings
Applied Surface Science, 2006Co-Authors: F. H. Scholes, C. Soste, S G Hardin, A.e. Hughes, P. R. CurtisAbstract:Cerium-based conversion coatings are progressing as an effective alternative to hazardous chromate-based systems used in the treatment of metal surfaces. However, there is still considerable debate over the mechanism by which these coatings are formed. Here, Titrations of cerium-based conversion coating solutions were carried out in order to model the reactions that occur at the metal-solution interface during coating, with a particular emphasis on investigating the role of hydrogen peroxide (H2O2). The Titration curves obtained support the proposed formation of Ce(III) peroxo complexes such as Ce(H2O2)3+ as an initial step, followed by deprotonation, oxidation and precipitation to form peroxo-containing Ce(IV) species such as Ce(IV)(O2)(OH)2. The precipitates resulting from Titrations were characterised by Raman spectroscopy, X-ray diffraction and thermogravimetric analysis, confirming the presence of peroxo bonds, and nano-sized CeO2 crystallites that decreased in size with increasing H2O2 concentration. Characterisation of cerium conversion coatings on aluminium alloy surfaces confirmed the presence of peroxo species in the coatings, thereby supporting the Titration model. © 2006 Elsevier B.V.
Graciliano De Oliveira Neto - One of the best experts on this subject based on the ideXlab platform.
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formalin and paraformaldehyde as end point indicators in catalytic thermometric titrimetry
Analyst, 1993Co-Authors: Oswaldo E S Godinho, Julio Cesar B Fernandes, Luiz M Aleixo, Graciliano De Oliveira NetoAbstract:The use of formalin solution as an end-point indicator in the Titration of both acids and bases in aqueous solutions was investigated. In both instances, a lowering in temperature at the end-point, due to depolymerization of poly(oxymethylene glycols), was observed. Endothermic end-points were also obtained by using paraformaldehyde as an end-point indicator in Titrations of acids in aqueous solutions. The use of paraformaldehyde in the Titration of very weak acids and of some sparingly soluble acids solubilized in micellar suspensions of cationic detergents was also investigated.
V Gicquel - One of the best experts on this subject based on the ideXlab platform.
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quantitative assay of 3 4 diaminopyridine in water by thermometric titrimetry
Thermochimica Acta, 1998Co-Authors: V Gicquel, Gwenola Burgot, Jean-louis BurgotAbstract:Abstract Thermometric titrimetry allows the quantitative assay of pure 3,4-diaminopyridine or in pharmaceutical capsules by Titration in water by hydrochloric acid. Satisfactory Titrations with 99 p 100 recovery and 1 p 100 precision were obtained with amounts of about 4.5×10 −4 mol. Lactose and starch used as excipients in the capsules as well as gelatin which constitutes their matrix did not interfere in the Titration.
