A method of sensitivity calibration of multichannel Raman spectrometers is described which employs the fluorescence spectrum of quinine as an intensity standard. The reported absolute fluorescence spectrum of quinine was least-squares fitted with a polynomial so that it gave an interpolation of the spectrum in the "Raman scale." The obtained least-squares-fitted fluorescence spectrum was cross-checked with the rotational Raman spectrum of D<sub>2</sub>. The fluorescence intensities calculated for every 100 cm<sup>−1</sup> from the two Ar<sup>+</sup> laser lines are tabulated for convenience.
K. Iwata, H. Hamaguchi, and M. Tasumi, "Sensitivity Calibration of Multichannel Raman Spectrometers Using the Least-Squares-Fitted Fluorescence Spectrum of Quinine," Appl. Spectrosc. 42, 12-14 (1988)