Author
Yvette Marin
Bio: Yvette Marin is an academic researcher from Sorbonne. The author has an hindex of 1, co-authored 1 publications receiving 12 citations.
Papers
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TL;DR: In this paper, auteurs ont prepared 67 precipites, i.e., gravimetriques, for effectuer le dosage gravimetrique du cuivre, and le thermobalance de Chevenard a permis de determiner les temperatures auxquelles il faut les porter pour obtenir un poids correct.
12 citations
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TL;DR: In this paper, the thermal decomposition of sixteen metal sulfates was studied by thermogravimetry at heating rates of 2 and 5°C min −1 in flowing air and high-purity nitrogen.
101 citations
TL;DR: In this paper, the mechanism of decomposition of metal sulphates is discussed, making use of additional information obtained from isothermal studies and X-ray diffraction measurements, and the activation energies of these reactions were calculated and found to increase, with almost the same increments, in the order Zn
62 citations
TL;DR: In this paper, the authors take a fresh look at the decomposition of calcium oxalate and warn users of thermogravimetric analysis against the hasty interpretation of results obtained.
Abstract: The goal of this study is twofold: to take a fresh look at the decomposition of calcium oxalate and to warn users of thermogravimetric analysis against the hasty interpretation of results obtained. Since the pioneer work of Duval 70 years ago, the scientific community has agreed unanimously as to the decomposition of anhydrous calcium oxalate (CaC2O4) into calcium carbonate (CaCO3) and CO gas, and that of the calcium carbonate into calcium oxide (CaO), and CO2 gas. We will demonstrate how these reactions, simple in appearance, in fact result from a succession of reactive phenomena involving numerous constituents both solid (CaCO3, free carbon) and gaseous (CO2 and CO) produced by intermediary reactions. The mass losses evaluated in the two distinct domains correspond closely to the molar masses of CO and CO2, respectively. The simple mathematical calculation of that mass loss has simply concealed the existence of other reactions, and, most particularly the Boudouard reaction and that of solid phases between CaCO3 and C. It just goes to show that appearances can be deceiving.
31 citations
TL;DR: In this article, the dehydration of CuSO 4 · 5H 2 O was studied by sealed and open-tube DTA, QDTA, and by microreflectance and transmittance spectroscopy.
24 citations
TL;DR: In this paper, the shape, size, and ratio of the segments of the curves obtained during the heating were determined for quantitative analysis of mixtures of copper and/or copper oxides.
Abstract: The thermogravimetry of mixtures of metallic copper and copper oxides was studied. The experiments were performed by heating the samples in air to 700–800° to transform all the components to copper(II) oxide, and continuing the heating in nitrogen to 1050–1100° when the dissociation of copper(II) oxide to copper(I) oxide is complete. The identification of the components and their quantitative determination were carried out by determining the shape, size, and ratio of the segments of the curves obtained during the heating. The method can be used for quantitative analysis of mixtures of copper and/or copper oxides.
18 citations