CWA 18134:2024

This CEN Workshop Agreement (CWA) provides a procedure for twinning Raman instruments using a test sample to harmonize their Raman spectra in terms of intensity.
This twinning protocol allows to correlate different Raman instruments to obtain equal Raman spectra in terms of Raman intensity, improving comparability, reproducibility and reliability. It is intended to be applied by end-users of Raman spectroscopy instruments, Raman manufacturers or users of Raman data.
The twinning protocol is applicable to any kind of Raman instrument (non-confocal and confocal) within the boundaries described in Section 6.1. The protocol has been developed using Raman instruments using 532 nm and 785 laser sources. Prior to use, this protocol requires that the Raman instrument or the acquired test sample data has already undergone a full calibration on x and y-axis. This twinning protocol has been tested after applying the calibration protocol described in CWA 18133:2024. The protocol may have applications beyond the stated limits, such as other previous calibration protocols or systems using different excitation sources, but its effectiveness is not confirmed.