Influence of absorption on quantitative analysis in Raman spectroscopy

Zili Wu; Chao Zhang; Peter C. Stair

doi:10.1016/j.cattod.2005.11.077

Influence of absorption on quantitative analysis in Raman spectroscopy

Zili Wu, Chao Zhang, Peter C. Stair^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Absorption of both the excitation and Raman scattered light by the sample (self-absorption) is common in UV Raman spectroscopy and sometimes in visible and FT-Raman spectroscopy due to electronic or vibrational excitation. Self-absorption affects Raman bands and usually results in a non-linear relationship between the Raman intensity and sample concentration. This paper compares quantitative analysis methods for Raman measurements of absorbing liquid and solid samples. Methods based on both internal and external standards can be used to correct for self-absorption. Examples including both liquid (1-methylnaphthalene/isooctane) and solid (V/δ-Al₂O ₃) systems were used to compare the effectiveness of these methods. The results show that as long as certain restrictions on the use of these analysis methods are satisfied, the self-absorption problem in Raman spectroscopy can be accurately corrected.

Original language	English (US)
Pages (from-to)	40-47
Number of pages	8
Journal	Catalysis Today
Volume	113
Issue number	1-2
DOIs	https://doi.org/10.1016/j.cattod.2005.11.077
State	Published - Mar 30 2006

Funding

This work is financially supported by ATHENA and the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy under Grant No. DE-FG02-97ER14789. The Athena project is funded by the Engineering & Physical Sciences Research Council (EPSRC) of the UK and Johnson Matthey plc.

Keywords

Absorption
Correction
Diffuse reflectance
External standard
Internal standard
Quantitative analysis
Raman spectroscopy
Scattering

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1016/j.cattod.2005.11.077

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title = "Influence of absorption on quantitative analysis in Raman spectroscopy",

abstract = "Absorption of both the excitation and Raman scattered light by the sample (self-absorption) is common in UV Raman spectroscopy and sometimes in visible and FT-Raman spectroscopy due to electronic or vibrational excitation. Self-absorption affects Raman bands and usually results in a non-linear relationship between the Raman intensity and sample concentration. This paper compares quantitative analysis methods for Raman measurements of absorbing liquid and solid samples. Methods based on both internal and external standards can be used to correct for self-absorption. Examples including both liquid (1-methylnaphthalene/isooctane) and solid (V/δ-Al2O 3) systems were used to compare the effectiveness of these methods. The results show that as long as certain restrictions on the use of these analysis methods are satisfied, the self-absorption problem in Raman spectroscopy can be accurately corrected.",

keywords = "Absorption, Correction, Diffuse reflectance, External standard, Internal standard, Quantitative analysis, Raman spectroscopy, Scattering",

author = "Zili Wu and Chao Zhang and Stair, {Peter C.}",

note = "Funding Information: This work is financially supported by ATHENA and the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy under Grant No. DE-FG02-97ER14789. The Athena project is funded by the Engineering & Physical Sciences Research Council (EPSRC) of the UK and Johnson Matthey plc.",

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doi = "10.1016/j.cattod.2005.11.077",

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AU - Zhang, Chao

AU - Stair, Peter C.

N1 - Funding Information: This work is financially supported by ATHENA and the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy under Grant No. DE-FG02-97ER14789. The Athena project is funded by the Engineering & Physical Sciences Research Council (EPSRC) of the UK and Johnson Matthey plc.

PY - 2006/3/30

Y1 - 2006/3/30

N2 - Absorption of both the excitation and Raman scattered light by the sample (self-absorption) is common in UV Raman spectroscopy and sometimes in visible and FT-Raman spectroscopy due to electronic or vibrational excitation. Self-absorption affects Raman bands and usually results in a non-linear relationship between the Raman intensity and sample concentration. This paper compares quantitative analysis methods for Raman measurements of absorbing liquid and solid samples. Methods based on both internal and external standards can be used to correct for self-absorption. Examples including both liquid (1-methylnaphthalene/isooctane) and solid (V/δ-Al2O 3) systems were used to compare the effectiveness of these methods. The results show that as long as certain restrictions on the use of these analysis methods are satisfied, the self-absorption problem in Raman spectroscopy can be accurately corrected.

AB - Absorption of both the excitation and Raman scattered light by the sample (self-absorption) is common in UV Raman spectroscopy and sometimes in visible and FT-Raman spectroscopy due to electronic or vibrational excitation. Self-absorption affects Raman bands and usually results in a non-linear relationship between the Raman intensity and sample concentration. This paper compares quantitative analysis methods for Raman measurements of absorbing liquid and solid samples. Methods based on both internal and external standards can be used to correct for self-absorption. Examples including both liquid (1-methylnaphthalene/isooctane) and solid (V/δ-Al2O 3) systems were used to compare the effectiveness of these methods. The results show that as long as certain restrictions on the use of these analysis methods are satisfied, the self-absorption problem in Raman spectroscopy can be accurately corrected.

KW - Absorption

KW - Correction

KW - Diffuse reflectance

KW - External standard

KW - Internal standard

KW - Quantitative analysis

KW - Raman spectroscopy

KW - Scattering

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Influence of absorption on quantitative analysis in Raman spectroscopy

Abstract

Funding

Keywords

ASJC Scopus subject areas

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