Spectrometer calibration protocol for Raman spectra recorded with different excitation wavelengths

被引:54
作者
Bocklitz, T. W.
Doerfer, T.
Heinke, R.
Schmitt, M.
Popp, J. [1 ,2 ]
机构
[1] Univ Jena, Inst Phys Chem, D-07743 Jena, Germany
[2] Univ Jena, Abbe Ctr Photon, D-07743 Jena, Germany
关键词
Raman spectroscopy; Spectrometer calibration; Chemometric analysis;
D O I
10.1016/j.saa.2015.04.079
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
The combination of Raman spectroscopy with chemometrics has gained significant importance within the last years to address a broad variety of biomedical and life science questions. However, the routine application of chemometric models to analyze Raman spectra recorded with Raman devices different from the device used to establish the model is extremely challenging due to Raman device specific influences on the recorded Raman spectra. Here we report on the influence of different non-resonant excitation wavelengths on Raman spectra and propose a calibration routine, which corrects for the main part of the spectral differences between Raman spectra recorded with different (non-resonant) excitation wavelengths. The calibration routine introduced within this contribution is an improvement to the known 'standard' calibration routines and is a starting point for the development of a calibration protocol to generate spectrometer independent Raman spectra. The presented routine ensures that a chemometric model utilizes only Raman information of the sample and not artifacts from small shifts in the excitation wavelength. This is crucial for the application of Raman-spectroscopy in real-world-settings, such as diagnostics of diseases or identification of bacteria. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:544 / 549
页数:6
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