Discriminating paints with different clay additives in forensic analysis of automotive coatings by FT-IR and raman spectroscopy

Figure 6 shows the IR spectra of two China National Standard Materials: GBW03101a (one kind of clay minerals) and GBW 03121 (kaolin). Indicative peaks above 3000 cm1, 900-1000 cm1, and 1640 cm'1 were too weak to employ as qualitative peaks even with an MCT detector. For [Raman] analysis, both s...

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Bibliographic Details
Published in:Spectroscopy 2012-04, Vol.27 (4), p.36
Main Authors: Lv, Jungang, Feng, Jimin, Liu, Yong, Wang, Zhaohong, Zhao, Meng, Cai, Yanming, Shi, Rongguang
Format: Magazinearticle
Language:English
Subjects:
Additives
Analysis
Automobiles
Bentonite
Clay
Coatings
Coatings industry
Forensic sciences
Paints
Raman spectroscopy
Spectrum analysis
Studies
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Summary:Figure 6 shows the IR spectra of two China National Standard Materials: GBW03101a (one kind of clay minerals) and GBW 03121 (kaolin). Indicative peaks above 3000 cm1, 900-1000 cm1, and 1640 cm'1 were too weak to employ as qualitative peaks even with an MCT detector. For [Raman] analysis, both samples were found to have serious fluorescence interference. Sample bleaching for 60 min and 3-9 accumulations were used in sample preparation to obtain better spectra.
ISSN:0887-6703
1939-1900