Calibration of a reflectance FTIR method for determination of dissolved CO2 concentration in rhyolitic glasses

Saved in:
Online Access: Get full text
doi: 10.1016/S0016-7037(00)00447-6
Authors:Moore, Gordon; Chizmeshya, Andrew; McMillan, Paul F.
Author Affiliations:Primary:
Arizona State University, Department of Chemistry and Biochemistry, Tempe, AZ, United States
Volume Title:Geochimica et Cosmochimica Acta
Source:Geochimica et Cosmochimica Acta, 64(20), p.3571-3579. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037
Publication Date:2000
Note:In English. 23 refs.; illus., incl. 3 tables
Summary:A technique based upon infrared reflectance spectroscopy is developed as an alternative to the Fourier transform infrared (FTIR) transmission method for the quantitative measurement of dissolved molecular carbon dioxide in aluminosilicate glasses. The technique has the advantage that only a single sample surface need be polished, and no thickness measurement is necessary. The reflectance spectrum is analyzed by Kramers-Kronig relations or classical oscillator analysis to yield the optical constants and the absorption coefficient at 2350 cm-1, due to the asymmetric stretching (ν3) vibration of molecular CO2. The value obtained is in excellent agreement with values obtained by the transmission FTIR technique for a suite of rhyolitic glasses. For practical application of the method to rhyolites, an empirical correlation is developed between the normalized change in reflectance at 2350 cm-1 and the CO2 content, up to ∼0.40 wt%. Abstract Copyright (2000) Elsevier, B.V.
Sections:Apparatus and techniques
Subsections:Chemical, XRF, and other instrumental methods
Subjects:Calibration; Carbon dioxide; Concentration; Experimental studies; Fourier transform infrared spectroscopy; FTIR spectra; Glasses; Igneous rocks; Infrared spectra; Infrared spectroscopy; Laboratory studies; Rhyolitic composition; Sample preparation; Solutes; Spectra; Spectroscopy; Synthesis; Techniques; Volcanic glass; Volcanic rocks
Abstract Numbers:01M/1254
Record ID:2001002839
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
Tags: Add Tag
No Tags, Be the first to tag this record!
Be the first to leave a comment!
You must be logged in first