Fourier transform infrared determination of CO2 evolved from carbonate in carbonated apatites

被引：0

作者：

A. R. Cassella

R. C. de Campos

S. Garrigues

M. de la Guardia

A. Rossi

机构：

[1] Department of Analytical Chemistry,

[2] Pontificia Universidade Catolica do Rio de Janeiro,undefined

[3] Brazil and Centro de Ciencias Biologicas e Ambientais,undefined

[4] Universidade Santa Ursula,undefined

[5] Rio de Janeiro,undefined

[6] Brazil,undefined

[7] Department of Analytical Chemistry,undefined

[8] Pontificia Universidade Catolica do Rio de Janeiro,undefined

[9] Brazil,undefined

[10] Department of Analytical Chemistry,undefined

[11] University of Valencia,undefined

[12] Spain e-mail: Miguel.Delaguardia@uv.es,undefined

[13] Centro Brasileiro de Pesquisas Fisicas,undefined

[14] Rio de Janeiro,undefined

[15] Brazil,undefined

来源：

Fresenius' Journal of Analytical Chemistry | 2000年 / 367卷

关键词：

Nitrogen; Fourier; Fourier Transform; Calibration Curve; Hydrochloric Acid;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A quantitative method based on FTIR has been developed to determine carbonate in synthetic apatites. The method measures the evolved CO2 after reaction of 50 mg apatite with 2 mL of hydrochloric acid (0.5 M) in a reaction vessel, heated to 40 °C. The CO2 evolved was swept by a carrier of nitrogen to a laboratory-made infrared gas cell of 39 mm pathlength and 490 μL volume. The signals were recorded as a function of time and the areas of the chemigram peaks obtained from the measurements in the wavenumber range of 2500–2150 cm–1, were interpolated using a calibration curve. The method can be used to study apatites with carbonate contents below 0.2% with a sampling frequency of 8 h–1.

引用

页码：556 / 561

页数：5