Quartz Enhanced Photoacoustic Spectroscopy for Detection of Improvised Explosive Devices and Precursors

Figure 16

Absorption spectra of 200 ppm of hydrogen peroxide obtained with our QEPAS sensor (multicolor plots). Also several peaks from water were clearly observed, since vapours were generated starting from a liquid solution at 33% hydrogen peroxide in water. The high resolution spectrum of 1 ppm hydrogen peroxide from the PNNL database is also shown for reference (in the inset).