Fig. 4: PX light source for portable chromatography. | Communications Chemistry

Fig. 4: PX light source for portable chromatography.

From: Hand-portable HPLC with broadband spectral detection enables analysis of complex polycyclic aromatic hydrocarbon mixtures

Fig. 4

a The spectral emission profile of the light source used in this study showing emission from 180 to 890 nm. b) To test stability, total intensity is measured overtime of the PX light source measured by a spectrometer when powered by mains power and by battery. Intensity is normalised to that at t = 0 min. c Shown here is the variation of intensity at wavelengths across the spectral range. d The flow cell was filled with the 24 component PAH mix and irradiated for 30 min at the given pulse frequency (n = 3). Sample degradation was quantified using the total area under the absorbance curve.

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