Influence of absorption on quantitative analysis in Raman spectroscopy

Wu, Zili; Zhang, Chao; Stair, Peter C.

doi:10.1016/j.cattod.2005.11.077

Cited by 39 publications

(47 citation statements)

References 30 publications

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“…As it considers only the absolute intensity of a given band, this method minimises the matrix effect, but it is potentially affected by focusing errors, surface microtopography (Behrens et al, 2006;Di Muro et al, 2006a;Mercier et al, 2009) and the medium self-absorption (Wu et al, 2006).…”

Section: Calibration Proceduresmentioning

confidence: 99%

Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Mercier

Muro²,

Métrich

et al. 2010

Geochimica et Cosmochimica Acta

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Section: Calibration Proceduresmentioning

confidence: 99%

Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Mercier

Muro²,

Métrich

et al. 2010

Geochimica et Cosmochimica Acta

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“…Several reviews of recent publications are available [31,114]. It has been shown that corrections can be made using the Kubelka-Munk formalism [116][117][118][119]. It may occur that a working catalyst changes color under reaction conditions (e.g.…”

Section: G Characterization Of Catalysts Under Working Conditionsmentioning

confidence: 99%

Vibrational Spectroscopy

Mestl¹,

Knözinger

2008

Handbook of Heterogeneous Catalysis

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“…1 shows a correlation between the observed Raman intensity and the amount of Cr 61 in the catalyst in the range 0-1.5 wt% and suggests that the amount of Cr 61 can be monitored quantitatively by using in situ Raman spectroscopy. Recently, a similar calibration line for low-loaded supported vanadium oxide catalysts has been presented by Wu et al 11 From a practical point of view, however, it would be advantageous if no internal standard has to be added for Raman quantification. Thus, in line with the previous work, the diffuse reflectance measured at 562 nm with UV-Vis spectroscopy (corresponding to a Raman shift of 996 cm À1 , i.e.…”

Section: Development Of a Calibration Linementioning

confidence: 99%

Dealing with a local heating effect when measuring catalytic solids in a reactor with Raman spectroscopy

Tinnemans

Kox

Sletering

et al. 2006

Phys. Chem. Chem. Phys.

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In continuation of our previous work on the applicability of the G(R N ) correction factor for the quantification of Raman spectra of coke during propane dehydrogenation experiments (Phys. Chem. Chem. Phys., 2005, 7, 211), research has been carried out on the potential of this correction factor for the quantification of supported metal oxides during reduction experiments. For this purpose, supported chromium oxide catalysts have been studied by combined in situ Raman and UV-Vis spectroscopy during temperature programmed reduction experiments with hydrogen as reducing agent. The goal was to quantify on-line the amount of Cr 61 in a reactor based on the measured in situ Raman spectra. During these experiments, a significant temperature effect was observed, which has been investigated in more detail with a thermal imaging technique. The results revealed a temperature 'on the spot' that can exceed 100 1C. It implies that Raman spectroscopy can have a considerable effect on the local reaction conditions and explains observed inconsistencies between the in situ UV-Vis and Raman data. In order to minimize this heating effect, reduction of the laser power, mathematical matching of the spectroscopic data, a different cell design and a change in reaction conditions has been evaluated. It is demonstrated that increasing the reactor temperature is the most feasible method to solve the heating problem. Next, it allows the application of in situ Raman spectroscopy in a reliable quantitative way without the need of an internal standard.

show abstract

Influence of absorption on quantitative analysis in Raman spectroscopy

Cited by 39 publications

References 30 publications

Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Spectroscopic analysis (FTIR, Raman) of water in mafic and intermediate glasses and glass inclusions

Vibrational Spectroscopy

Dealing with a local heating effect when measuring catalytic solids in a reactor with Raman spectroscopy

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