Determination of ferrous and ferric iron from total iron content and thermogravimetric analysis

被引：6

作者：

Zorzi, J. E. ^{[1
]}

Perottoni, C. A. ^{[1
]}

Cruz, R. C. D. ^{[1
]}

机构：

[1] Univ Caxias do Sul, BR-95070560 Caxias Do Sul, RS, Brazil

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2019年 / 136卷 / 05期

关键词：

Iron oxidation state; Thermogravimetric analysis; Ilmenite; Magnetite; Igneous rocks; CRYSTALLIZATION KINETICS; SINTERING BEHAVIOR; OXIDATION-STATE; GLASS; ROCKS; MICROPROBE; RATIO; FE; CLASSIFICATION; SILICATES;

D O I：

10.1007/s10973-018-7803-9

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Ferrous (Fe2+) and ferric (Fe3+) iron content in mineral samples was determined from total iron (as obtained, for instance, from X-ray fluorescence analysis) and mass increase upon switching the purge gas from inert to oxidizing, at high temperature, in a thermogravimetric analysis. The method was validated using analytical-grade ilmenite (FeTiO3, or Fe2+O<bold>TiO</bold>2) and magnetite (Fe3O4, or Fe2+ <bold>Fe</bold><sub arrange= stack 2sup arrange=stack 3+O-3). The estimated mass percentages of FeO are less than the expected values, according to chemical composition, by 1.1 and 1.2 percentage points for ilmenite and magnetite, respectively. The application of this method is further illustrated by determining the Fe2+ and Fe3+ content, expressed as FeO and Fe2O3, in three samples of igneous rocks.

引用

页码：1879 / 1886

页数：8

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