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The application of drift spectroscopy to the multicomponent analysis of organic chemicals adsorbed on montmorillonite

Robert W. Parker and Raymond L. Frost
The application of drift spectroscopy to the multicomponent analysis of organic chemicals adsorbed on montmorillonite
Clays and Clay Minerals (February 1996) 44 (1): 32-40

Abstract

Diffuse Reflectance Fourier Transform Infrared spectroscopy was used to monitor both molecular interactions and concentrations of volatile organic chemicals adsorbed on a commercial montmorillonite. Chemicals tested included propanoic acid, hexanal, heptanal, trimethylamine, dimethylsulfide and dimethyldisulfide. Diffuse Reflectance Fourier Transform Infrared spectroscopy had several advantages over other infrared techniques including ease of sample preparation, greater numbers of useful bands and the ability to detect both major and minor components from the same spectra. Evidence for the formation of organo-clay complexes was found for all chemicals except dimethylsulfide. Spectra of mixed chemicals on the clay showed numerous overlapping bands. Organic concentrations were determined by multicomponent analysis using a least squares curve fitting technique. Significant correlation (P < 0.01) between actual and determined concentrations of added organics was obtained for all except dimethylsulfide. Here the weak spectral contribution appeared to be overshadowed by the strongly adsorbing montmorillonite with consequent decrease in sensitivity. Diffuse Reflectance Fourier Transform Infrared spectroscopy of organo-montmorillonite complexes could be used both as a means of studying molecular interactions and for the determination of adsorbed organic concentrations.


ISSN: 0009-8604
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 44
Serial Issue: 1
Title: The application of drift spectroscopy to the multicomponent analysis of organic chemicals adsorbed on montmorillonite
Affiliation: Queensland Department of Lands, Robert Wicks Research Station, Inglewood, Queensl., Australia
Pages: 32-40
Published: 199602
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 22
Accession Number: 1996-056061
Categories: Geochemistry of rocks, soils, and sedimentsMineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: Queensland University of Technology, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 199618
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