6533b852fe1ef96bd12aacb6
RESEARCH PRODUCT
Fourier transform infrared determination of CO 2 evolved from carbonate in carbonated apatites
A R CassellaSalvador GarriguesM. De La GuardiaAntonella M. RossiR. C. De Campossubject
InfraredCalibration curveCarbonatesAnalytical chemistryInfrared spectroscopyHydrochloric acidEquipment DesignCarbon DioxideBiochemistryApatitechemistry.chemical_compoundsymbols.namesakeFourier transformchemistryApatitesvisual_artSpectroscopy Fourier Transform Infraredvisual_art.visual_art_mediumsymbolsCarbonateFourier transform infrared spectroscopydescription
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 degrees C. The CO2 evolved was swept by a carrier of nitrogen to a laboratory-made infrared gas cell of 39 mm pathlength and 490 microL 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 2,500-2,150 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).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-07-03 | Fresenius' Journal of Analytical Chemistry |